Question

Find the product a²b(5b² - 3ab) and evaluate the result for a= -1 and b= 2​

Answer 1

Step-by-step explanation:

#hope it helps u u

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Answer 2

Answer:

$a {}^{2} b(5b {}^{2} - 3ab) \\ = 5a {}^{2} b {}^{3} - 3a {}^{3} b {}^{2}$

Now, substituting

a = -1

b = 2

$5a {}^{2} b {}^{3} - 3a {}^{3} b {}^{2} \\ = 5 \times ( - 1) {}^{2} \times 2 {}^{3} - 3 \times ( - 1) {}^{3} \times 2 {}^{2} \\ = 5 \times 1 \times 8 - 3 \times ( - 1) \times 4 \\ = 40 - ( - 12) \\ = 40 + 12 \\ = 52$