Question

$(2-3b)^2-16b^2$

Answer 1

Answer:

b = 2/7 or b = -2

Step-by-step explanation:

(2 - 3 b ) ^2 - 16 b^2 = 4 + 9b^2 - 12 b - 16b^2

= - 7 b^2 - 12b + 4

factorizing we get

7b^2 + 12 b -4 = 0

7b^2 + 14 b - 2b -4 = 0

7b(b+2) -2 (b+2) = 0

(7b -2)(b+2) = 0

b = 2/7 or b = -2