Question

If f(x)-5×2-3x+2 and g(x) = 2×2-2x-2 then f(2)-g(-2) is:
(a) 2
(b) 4
(c) 6
(d) 18

Answer 1

Hope u like my process
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$= > \bf \: f(x) = 5 {x}^{2} - 3x + 2 \\ \\ \bf = > f(2) = 5 \times {2}^{2} - 3 \times 2 + 2 \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: =20 - 6 + 2 = \bf \: 16 \\ \\ = > \bf g(x) = 2 {x}^{2} - 2x -2 \\ \\ = > \bf g( - 2) = 2 {( - 2)}^{2} - 2( - 2) - 2 \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 8 + 4 - 2 = \bf \: 10$
Now..,

$= > \bf \: f(2) - g( - 2) \\ \\ = 16 - 10 = \bf \: 6$
Hence © is the required answer.

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