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{tex}x^2 + 6x - 16 = 0{/tex}
{tex}\Rightarrow{/tex} {tex}x^2 + 6x = 16{/tex}
{tex}\Rightarrow{/tex} {tex}x^2 + 6x + 9 = 16 + 9{/tex} [Adding on both sides square of coefficient of x, i.e. ({tex}\frac{6}{2}{/tex})²]
{tex}\Rightarrow{/tex} {tex}(x + 3)^2 = 25{/tex}
{tex}\Rightarrow{/tex} x + 3 = {tex}\pm{/tex}{tex}\sqrt{25}{/tex}
{tex}\Rightarrow{/tex} x + 3 =5 or x + 3 = -5
{tex}\Rightarrow{/tex} x = 2 or x = -8

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x4+x

Posted by Rudraksh Pawar 7 years, 4 months ago

CBSE > Class 10 > Mathematics

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A ladder 15 m long just reacher the top of a wall. If the ladder makes an angle of 60° with the wall ,find the height of the wall.

Posted by Krish Patel 7 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Devansh Gupta 7 years, 4 months ago

Let ladder be hypoteneuse Height of wall be perpendicular Now H = 15m angle = 60° SinQ=p/H Sin60°=p/15 Root3/2=p/15 Root3×15=p×2 P=15root3/2 Hence height be 15×1.732/2 m (root3=1.732) =15×.866 = 12.990m

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X€

Posted by Ni Ki 7 years, 4 months ago

CBSE > Class 10 > Mathematics

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Ni Ki 7 years, 4 months ago

Hcb

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Mode = 2 median - ???

Posted by Amruta Kuligod 7 years, 4 months ago

CBSE > Class 10 > Mathematics

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Real

Posted by Pradeep Yadav 7 years, 4 months ago

CBSE > Class 10 > Mathematics

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Proofs of all theorems of triangles

Posted by Aadi Jain 7 years, 4 months ago

CBSE > Class 10 > Mathematics

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The four vertices of a quaderateral are (1,2), (-5,6) ,(7,-4) and (k,-2) are taken in order . If the area of quadrilateral is 0 find the value of k?

Posted by Kapil Khatri 7 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Anureet Kaur Saroaye 7 years, 4 months ago

Draw a quad. And label it as ABCD

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What is the difference between Euclid's division lemma and Euclid's division algorithm?

Posted by Bhavesh Mankar 4 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 4 years, 6 months ago

lemma : it is a proven statement which is used for proving another statement.

Algorithm: an algorithm is a series of well defined steps which gives a procedure for solving a type of problem.

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Find the sum of the 11th term of A.P., whose 6th term is 30.

Posted by Ayush Pandey 7 years, 4 months ago

CBSE > Class 10 > Mathematics

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Define secant to a circle

Posted by Arjun Akash 6 years, 4 months ago

CBSE > Class 10 > Mathematics

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Sia ? 6 years, 4 months ago

A secant of a curve is a line that intersects the curve in at least two (distinct) points.

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What are parabolas

Posted by Ishita Raturi 7 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Ritika Saini 7 years, 4 months ago

A symmetrical open plane curved form by the intersection of a cone with a plane parallel to its side..the path of a projectile under the influence of gravity follows a curve of this shape..

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Somya Kataria 7 years, 4 months ago

A parabola is a curve where any point is at an equal distance from: a fixed point (the focus ), and a fixed straight line (the directrix )

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Full form of rhs and lhs

Posted by Anurag Kumar 7 years, 4 months ago

CBSE > Class 10 > Mathematics