Question

4r^2+3s^2-rs r=-1 S=3

Need help with steps because everyone keeps saying it’s 26 but I get 28

Answer 1

34

Explanation:

4r² + 3s² - rs ← substitute r = - 1, s = 3 into the expression

= 4(- 1)² + 3(3)² - (- 1)(3)

= 4(1) + 3(9) - (- 3)

= 4 + 27 + 3

= 34