Question

9. If p(x) = 3x2 + 2x - 1 and q(x) = 2x2 - 2x + 5, find p(3) -q(3). ​

Answer 1

Answer:

8

Step-by-step explanation:

p(x) = 3x2 + 2x - 1

p(3) = 3x2 + 2*3 - 1

p(3) = 6 + 6 - 1

p(3) = 11

and

q(x) = 2x2 - 2x + 5

q(3) = 2x2 - 2*3 + 5

q(3) = 4 - 6 + 5

q(3) = 3

p(3) - q(3) = 11 - 3 = 8

Answer 2

Answer:

If $p(x)=3x^{2} +2x-1\ and\ q(x)=2x^{2} -2x+5$, then  

$p(3)-q(3)=15$.

Step-by-step explanation:

Given $p(x)=3x^{2} +2x-1$   and   $q(x)=2x^{2} -2x+5$.

So,      $p(3)=3(3)^{2} +2(3)-1=27+6-1=32$

and ,   $q(3)=2(3)^{2}-2(3) +5=18-6+5=17$

therefore, $p(3)-q(3)=32-17=15$.

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