Advertisement Remove all ads
Advertisement Remove all ads
Sum
factorise: x2 - x - 72
Advertisement Remove all ads
Solution
x2 - x - 72
= x2 - 9x + 8x - 72
= x(x - 9) + 8(x - 9)
= (x - 9)(x + 8)
Concept: Factorisation by Grouping
Is there an error in this question or solution?
Advertisement Remove all ads
APPEARS IN
Advertisement Remove all ads