Question

The roots of quadratic equation x2- 3x - 10 =0 are -------- and -----------.
(a) 5 and - 2 (b) - 5 and - 2 (c) - 5 and 2 (d) 5 and 2


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Answer 1

Answer:

x² - 3x - 10 = 0.

=> x² - 5x +2x - 10 = 0

=> x( x -5) +2( x -5) = 0

=> ( x -5)( x +2) = 0

=> x -5 = 0 , or x + 2 = 0

=> x = 5 , or x = -2

the roots are 5 and. -2

so ,the correct answer is option a.

Answer 2

Answer:

x2-3x-10=0

x2-5x+2x-10=0

x(x-5)+2(x-5)

(x+2)(x-5)

roots are 5 and -2

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