Question

factorise the following 1)25m²-16n²
2)x²-x-12
​

Answer 1

$\huge\sf\underline{Solution:}$

1)25m²-16n²

= (5m)²-(4n)²

=(5m+4n)(5m-4n)

2)x²-x-12

= x²-(4-3)x-12

=x²-4x+3x-12

=x(x-4)+3(x-4)

=(x+3)(x-4)

Answer 2

$\huge\bf{\blue{Answer:-}}$

▶️1• 25m^2-16m^2

➡️(5m+4m) (5m-4m)


2•▶️x^2-x-12

=➡️ x^2-(4x-3x)-12
x^2-4x+3x-12
x(x-4)+3(x-4)
(x-4) (x+3)

Hope it's help