Question

Add: 2ab (-4a +6b + 3ab ) and 6a b (-4b+6) and verify the result for a=-2 and b = 3​

Answer 1

2ab ( -4a +6b + 3ab )+6ab (-4b+6)

$- 8a {}^{2}b + 12a {b}^{2} + 6 {a}^{2} {b}^{2} - 24a {b}^{2} + 36ab \\ - 8 {a}^{2} b - 12a {b}^{2} + 6 {a}^{2} {b}^{2} + 36ab$

Verification:-

Putting the value of a= -2 and b=3

-8(-2)(-2)(3)-12(-2)(3)(3)+6(-2)(-2)(3)(3)+36(-2)(3)

-96+216+216-216=120

Hence verified.

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Answer 2

Answer:

28a square b + 12ab cube - 18a square b cube