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Mathematics, 28.01.2021 17:10, tessadummer0033
The expressions 2(x^2 β 4xβ 21) - (x β 7)(x + 77) and ( xβ 7)(x + k) are equivalent.
What must be the value of k?
A.-148
B.-71
C.83
D.160
![answer](/tpl/images/cats/otvet.png)
Answers: 3
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The expressions 2(x^2 β 4xβ 21) - (x β 7)(x + 77) and ( xβ 7)(x + k) are equivalent.
What must be t...
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