Question

20 points

(a) Expand and simplify (9x - 2)(x + 2)
(b) Factorise fully 18a² + 45a
(c) Factorise y² - 10y + 24

Answer 1

Explanation:

a). 9(x-2)(x+2)

b).

Answer 2

(a)
`9x^2+16x-4`

(b)
`9a(2a+5)`

(c)
`(y-6)(y-4)`

Explanation:

(a)

`(9x-2)(x+2)=`

`9x^2-2x+18x-4=`

`9x^2+16x-4`

(b)

`18a^2+45a=`

`9a(2a+5)`

(c)

`y^2-10y+24=`

`(y-6)(y-4)`

Hope this helps!