Question

Factorise the following quadratic polynomials. X2 + 2x – 15​

Answer 1

Answer:

${x}^{2} + 2x - 15 = 0 \\ factorize \: by \: splitting \: middle \: term \\ {x}^{2} + 5x - 3x - 15 = 0 \\ = x(x + 5) - 3(x + 5) = 0 \\ = (x + 5)(x - 3) = 0 \\ = x = - 5 \: \: and \: \: 3 \: \: ans$

Answer 2

Answer:

x2 + 2x - 15

x2 + 5x - 3x - 15

x ( x + 5 ) - 3 ( x + 5 )

( x + 5 ) ( x - 3 )