Factorize the expression x a - c y c - a - WAEC Mathematics 1995 Question
Factorize the expression x(a - c) + y(c - a)
A
(a - c)(y - x)
B
(a - c)(x - y)
C
(a + c)(x - y)
D
(a + c)(x + y)
correct option: b
x(a - c) + y(c - a)
= x(a - c) - y(a - c)
= (x - y)(a - c)
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