Question

Can talk help with dis

Factorise
a- 49a² - 36b²
b- 3x³ - 48x
c- x² - 20x + 100
d- 4xy² - 8x⁴y + 16x²y² - 2x³y​

Answer 1

a. 49a² - 36b²

= (7a)² - (6b)²

using the identity a² - b² = (a + b) (a - b)

= (7a + 6b) (7a - 6b)