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When x - 4, y = -4 and m = -1/4, evaluate (x2y - y2m) (mx - ...
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when x - 4, y = -4 and m = -1/4, evaluate (x2y - y2m) (mx - mxy)

A. 300

B. 180

C. -180

D. -300

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University of Lagos Nigeria
11 May 2020

School not set Nigeria
19 July 2020
0

x = 4

y =  -4

m = -1/4

(x2y - y2m)(mx - xmy) = ((42 x (-4)) - ((-4)2 x (-1/4))) ((-1/4 x 4) - (-1/4 x 4 x (-4)))

= (-64 - (16 x (-1/4))) (-1 - (-1 x (-4))

= (-64 - (-4)) (-1 - 4)

=(-64 + 4)(-5)

= (-60)(-5)

= 300

Ans A

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