Find the value of the quadratic polynomial 7s² - 4s + 6 if: Class 9

Find the value of the quadratic polynomial 7s² - 4s + 6 if: Class 9

Question 1.

Find the value of the quadratic polynomial 7s² - 4s + 6 if: Class 9

i. s = 0

ii. s = - 3

iii. s = 4

Solution:

i. Substituting s = 0 in 7s² - 4s + 6, we get

7(0)² - 4(0) + 6 = 0 - 0 + 6 = 6

ii. Substituting s = - 3 in 7s² - 4s + 6, we get

7(-3)² - 4(-3) + 6 = 7(9) + 12 + 6

= 63 + 12 + 6 = 81

iii. Substituting s = 4 in 7s² - 4s + 6, we get

7(4)² - 4(4) + 6 = 7(16) - 16 + 6

= 112 - 16 + 6 = 102