Asked by abby

let a = 2, b = -5, c = 7, and d = -4
Question ~ Evaluate b – a(cd + b)

This was my answer ~~
Evaluate b – a(cd + b)

(cd+b)=-33

(7)(-4)+(-5)

(7)(-4)=-28

(-28)+(-5)=-33

(-5)-(2)((-33))

(2)((-33))=-6

(-5)-(-6)=1

Can someone help/show me how to answer this question? and tell me what I did wrong?
Answered by PsyDAG
(cd+b) = 7*(-4) + (-5) = -28 - 5-33

a(cd+b) = -2 * (-33) = -66

Negative times negative = positive

b - (-66) = -5 + 66 = 61
Answered by abby
Thank you so much for your help!!
Answered by PsyDAG
You are welcome.
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