Factorise 4b^2 + 16b

expand (a-1) (a-2)

factorise x^2+8x+7

evaluate y^6 divide y^2

If x=-1 and y=5, find z when z=x^2+2y^2

Make x the subject, y=4x-3

Factorise 4b² + 16b ⇒ 4b (b+4)

expand (a-1) (a-2) ⇒ a (a-2) - 1 (a-2) ⇒ a² - 2a - 1a + 2 ⇒a² - 3a + 2

factorise x² + 8x + 7 ⇒ (x + 1) (x + 7)

evaluate y⁶ / y² ⇒ y * y * y * y * y * y / y * y = y⁴

if x = - 1 and y = 5, find z when z = x² + 2y²;

z = - 1² + 2 (5²) ⇒ 1 + 2 (25) ⇒1 + 50 = 51

Make x the subject: y = 4x - 3

y = 4x - 3

+3 + 3

3 + y = 4x

:4 : 4

(3+y) / 4 = x