Question

$(3a - 4b) ^{2} - (3a - b) ^{2}$
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Answer 1

Answer:

1.1 Evaluate : (3a-4b)2 = 9a2-24ab+16b2

1.2 Evaluate : (3a-b)2 = 9a2-6ab+b2

STEP

2

:

Pulling out like terms

2.1 Pull out like factors :

15b2 - 18ab = -3b • (6a - 5b)

Final result :

-3b • (6a - 5b)