Question

solve please
$for \: the \: polynomial \: {mx }^{2} - 2x + 3 \: \\ if \: p( - 1) = 7 \: then \: find \: m.$
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Answer 1

Answer:

substitute -1 in the place of 'x'.

then ...

p(x) = p(-1)=m(-1)^2 - 2(-1) + 3 = 0

0 = m(1) + 2 +3

0= m +5

-5=m

therefore m = -5 .

hope helpsss