Question

Simplify: (3a − 2)(a − 1)(2a + 9)


correct ans......​

Answer 1

here is your answer... ..

Answer 2

SOLUTION

TO SIMPLIFY

(3a − 2)(a − 1)(2a + 9)

EVALUATION

$\sf{(3a - 2)(a - 1)(2a + 9)}$

$= \sf{ \bigg[3a (a - 1) - 2(a - 1) \bigg](2a + 9)}$

$= \sf{ \bigg[3 {a}^{2} - 3a - 2a + 2 \bigg](2a + 9)}$

$= \sf{ (3 {a}^{2} - 5a + 2) (2a + 9)}$

$\sf{ =2a (3 {a}^{2} - 5a + 2) +9 (3 {a}^{2} - 5a + 2)}$

$\sf{ = 6 {a}^{3 } - 10 {a}^{2} + 4a + 27{a}^{2} - 45a + 18 }$

$\sf{ = 6 {a}^{3 } + 17 {a}^{2} - 41a + 18 }$

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