Question

Factorise x²+4x-525
Factorise it plz

Answer 1

(x+25)(x-21)

Explanation:

x²+4x-525

multiply to get -525

add to get 4

x²+4x-525

(x²+21x)(+25x-525)

factorise:

x²+21x

x(x-21)

25x-525

25(x-21)

(x+25)(x-21)

Answer 2

(x+25)(x-21)

Explanation:

x²+4x-525

=x²-21x+25x-525

=x(x-21)+25(x-21)

=(x+25)(x-21)