Question

Find the roots of the following quadratic equations by factorisation
x* - 3x -10 = 0

Answer 1

x^2 - 3x - 10 = 0
x^2 + 2x - 5x -10 = 0
x(x + 2) - 5(x + 2) = 0
(x + 2)(x - 5) = 0
Roots are 5,-2

Answer 2

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Hey your question should be this x² - 3 x - 10 .

Sol : x² - 3 x - 10

    = x² - 5 x + 2 x - 10 

   = x ( x - 5 ) + 2 ( x - 5 )

   = ( x - 5 ) ( x + 2 )

  ( x - 5 ) = 0    or ( x + 2 ) = 0

   x = 5            or x = - 2.

Roots of ( x² - 3 x - 10 ) is 5 and ( - 2 ).


                                                ☺☺☺