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Solve x square -3x-10=0 by completing …

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Solve x square -3x-10=0 by completing square method

Posted by Tushar Verma 6 years, 8 months ago

CBSE > Class 10 > Mathematics

2 answers

Piyush Singh 6 years, 8 months ago

Briliant

0Thank You

Ca Dipesh Arora 6 years, 8 months ago

x² -3x - 10

x² - 3x -10 + 9/4 -9/4 (we square the term obtained by dividing the coefficient of x by 2, after that we add and subtract the same in to the equation)

now, (x² -3x + 9/4) -10-9/4

(x-3/2)² - 49/4 = 0

(x-3/2)² - (7/2)² = 0

(x-3/2-7/2) (x-3/2 +7/2) = 0

(x-10/2) (x + 4/2)

x=5, -2 is the solution

2Thank You

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CBSE > Class 10 > Mathematics