Question

5x square - 3 x + 7 at x=2

Answer 1

$x = 2 \\ \\ = 5x {}^{2} - 3x + 7 \\ \\ = 5(2) {}^{2} - 3(2) + 7 \\ \\ = 5 \times 4 - 6 + 7 \\ \\ = 20 - 6 + 7 \\ \\ = 20 + 1 \\ \\ = 21$

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Answer 2

HEYA MATE !

p(x)= 5x²-3x+7

g(x)= x-2 =0

p(2)= 5(2)²-3(2)+7

= 5*4 -6 +7

= 20 -6 +7

= 21

hope it helps