2. The value of the polynomial 7x + 3x² – 4, when x = – 2 is a) 100 b) 110 c) 120 d) 130​

Question

2. The value of the polynomial 7x + 3x² – 4, when x = – 2 is
a) 100
b) 110
c) 120
d) 130​

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Cora 1 month 2021-08-19T00:02:18+00:00 1 Answer 0 views 0

Answers ( )

    0
    2021-08-19T00:03:56+00:00

    Answer:

    -6

    Step-by-step explanation:

    p(x) = 7x + 3 {x}^{2}  - 4

    p(x) = 3 {x}^{2}  + 7x - 4

    when \: x =  - 2

    p(x) = 3 {x}^{2}  + 7x - 4

     = 3 { (- 2)}^{2}  + 7( - 2) - 4

     = 12  - 14 - 4

     =  - 6

    hence, the actual value of polynomial when x= -2 is -6 which is not mentioned in given options.

    hope it helps

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