Question

Find the value of the expression 7a² + 7a - 20 when a=-4​

Answer 1

Answer:

112 + 28 -20

140-20

120.

THIS IS YOUR ANSWER .

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Answer 2

Answer:

given a=-4,

so substituting a in equation,

7(-4)^2+7(-4)-20

7(16)-28-20

138-48

=90

hope it helps you...........

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