Question

When A=300, solve the equation x^2 - 40x + A = 0 by factorising​

Answer 1

Answer :

$\:$

(x–30) (x-10)

Given equation :

• x² - 40x + A

when A = 300

1. Use the sum-product pattern

x²- 40x + 300

x²−10x−30x+300

2. Common factor from the two pairs

x² – 10x-30x+300

x(x−10)−30(x−10)

3. Rewrite in factored form

x(x−10)−30(x−10)

(x-30) (x-10)