Answer:
Step-by-step explanation:
20
Given
2x² - y ← substitute x = 3 and y = - 2 into the expression
= 2(3)² - (- 2)
= 2(9) + 2
= 18 + 2
= 20
-.5
(x+1)/3
Let x = -2.5
(-2.5+1)/3
Parentheses first
-1.5/3
D.) 2(x-3)(x-4)
2x^2 -14x +24 = 2(x^2 - 7x + 12)
12 = 3*4
3*1 + 4*1 = 7
2(x-3)(x-4)
71
100-29=71
