Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. Evaluate th

Question

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.

Evaluate the expression for the given value of the variable.

4b−8|+∣∣−1 − b^2∣∣+ 2b^3; b=−2

please help

in progress 0
Tryphena 4 years 2021-09-05T10:07:01+00:00 1 Answers 12 views 0

Answers ( )

  1. nguyetanh
    0
    2021-09-05T10:08:13+00:00
    Reply

    Question: Evaluate the expression for the given value of the variable. | − 4b − 8 | + ∣ − 1 − b² | + 2b³; b = − 2

    Answer:

    -11

    Step-by-step explanation:

    What we are required to do here is to find the value of the expression assuming that variable b = -2.

    Bear in mind that, where you see the symbol “| … |”, enclosing a set of terms, the absolute value after performing whatever function with the enclosed terms is what is to be found. This means, after performing the operation, if you have a negative value, simply ignore the negative sign.

    Now let’s evaluate at b = -2

    |- 4b – 8| + ∣-1 – b²| + 2b³ (given)

    |- 4(-2) – 8| + ∣-1 – (-2)²| + 2(-2)³ (substitution)

    |8 – 8| + ∣-1 – 4| + 2(-8)

    |0| + ∣-5| – 16

    0 + 5 – 16 (absolute value of -5 = 5)

    = -11

Leave an answer

Browse

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