Question

For the polynomial mx² - 2x + 3 if p(- 1) = 7 then find m.
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Answer 1

Answer:

m(-1)² - 2(-1) + 3=7

m(1) - 2 + 3=7

m(1) -2 = 7-3

m(1) -2= 4

m(1)= 4+2

m(1)=6

m=6÷1

m= 6.

Answer 2

Answer:

p(x)= mx² -2x +3

Therefore p(-1)= m(-1)² -2(-1) +3 = 7

m +2 +3 =7

m+5=7

m=7-5

m=2