Question

find the root of the following quadratic equation by factorisation x square - 3 x - 10 = zero​

Answer 1

Answer:

Step-by-step explanation:

=x^2 -3x -10

=x^2 -5x + 2x -10

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

=(x-5) (x+2)

So roots are x=5

x= -2

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Answer 2

$\huge{x}^{2} - 3x - 10 = 0$

-3 can be written as (2-5)

so,

X²-3X-10=0

=>X²+(2-5)X-10=0

X²+2X-5X-10=0

X(X+2)-5(X+2)=0

(X-5)(X+2)=0

SO FOR ZEROES,

X-5=0

=>X=5

and,

X+2=0

=>X=-2

$\mathcal{ so \: x = 5 \: or \: - 2}$