Question

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Answer 1

6)

=(4×4-6×2×1+9×1)(2×2+3×1)

=(16-12+9)(4+7)

=13×11

=143 is the answer...

7)

9x(6x−5y)−12x2(6x−5y)

⇒(9x−12x2)(6x−5y)

⇒3x(3−4x)(6x−5y).

Hence, the answer is 3x(3−4x)(6x−5y).