7) 4b2 + 8b + 7 = 4 What the answer

Question

7) 4b2 + 8b + 7 = 4
What the answer

in progress 0
Khoii Minh 7 months 2021-07-26T22:28:44+00:00 2 Answers 3 views 0

Answers ( )

    0
    2021-07-26T22:29:46+00:00

    4b² + 8b + 3 = 0

    4b² + 2b + 6b + 3 = 0

    2b(2b + 1) + 3(2b + 1) = 0

    (2b + 3)(2b + 1) = 0

    b = -1/2 or b = -3/2

    0
    2021-07-26T22:30:08+00:00

    b= -1/2 or b= -3/2

    1. Subtract 4 from both sides.
    2. Factor left side of equation.
    3. Set factors equal to 0.

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )