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if α and β are the zeroes of the polynomial x^2 + 7x + 12 then find the value of α+β+2αβ

Posted by Kheem Mukesh 6 years, 10 months ago

CBSE > Class 10 > Mathematics

5 answers

Madhur Dubey ??? 6 years, 10 months ago

Since alpha and beta are zeros of the following polynomial therefore alpha + beta + 2 alpha beta is equals to alpha + beta whole square replacing alpha + beta by minus b Upon a now we have given the value of b and a we will put in this and we get answer 49

0Thank You

Rishi Jain 6 years, 10 months ago

0Thank You

Shabnam Star 6 years, 10 months ago

-7+2×12=17

1Thank You

Gurudhan Sathish 6 years, 10 months ago

Sorry 17

2Thank You

Gurudhan Sathish 6 years, 10 months ago

1.Identify a,b,c values from given quadratic equation 2.find sum of zeros and product of zeros 3.Substitute in the given expression Then we will get answer as 14

3Thank You

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CBSE > Class 10 > Mathematics