Question

factorise x square - 21 X + 90​

Answer 1

Answer:

The factors are (x - 15)(x - 6).

Step-by-step explanation:

The expression is: x² - 21x + 90.

Factorize the expression as follows:

$x^{2}-21x+90\\=x^{2}-15x-6x+90\\=x(x-15)-6(x-15)\\=(x-15)(x-6)$

Thus, the factors are (x - 15)(x - 6).

Answer 2

Step-by-step explanation:

x^2-21x+90

x^2-15x-6x+90

x(x-15)-6(x-15) (taking (x-15) common)

(x-6)(x-15)