Question

find the value of p(x)=3x^2 - 5x +3 at (i) x=-2 (ii) x=1

Answer 1

The value of p(x)=3x² - 5x +3 at i) x=-2 is 25 and ii) x=1 is 1

Explanation:

Given:

1. p(x)=3x² - 5x +3

2. x=-2

3. x=1

To find:

p(x)

Solution:

==> x=-2

==> p(x)=3x² - 5x +3

==> p(-2) = 3(-2)² -5(-2)+3

==> p(-2) = 3(4)+10+3

==> p(-2) = 12+10+3

==> p(-2) = 22+3

==> p(-2) = 25

==> x=1

==> p(x)=3x² - 5x +3

==> p(1) = 3(1)² -5(1)+3

==> p(1) = 3(1)-5+3

==> p(1) = 3-5+3

==> p(1) = 3+3-5

==> p(1) = 6-5

==> p(1) =1

The value of p(x)=3x² - 5x +3 at i) x=-2 is 25 and ii) x=1 is 1