Question

Factorise by regrouping.
(a) au - 5b + ab- 5u
(b) 8qx + 21py + 6px + 28qy
(c) 8bx - 15ay - 6by + 20ax
(d) 3m - 6n + 36nt - 18mt​

Answer 1

Step-by-step explanation:

(a) au-5b+ab-5u

u(a-5) +b(a-5)

(b+u)(a-5)

(b) 8qx+21py+6px+28qy

7y(3p+4q) +2x(4q+3p)

(7y+2x)(3p+4q)

(c) 8bx-15ay-6by+20ax

4x(2b+5a) -3y(5a+2b)

(4x-3y)(2b+5a)

(d) 3m-6n+36nt-18mt

3m(1-6t) - 6n(1-6t)

(3m-6n)(1-6t)

I m not sure about the answer so u can recheck it.