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Verified answer
A. 5x - y5.(-2) - 10
(-10) - 10
= -20
B. (x + 2y)²
(-2 + 2.10)²
(-2 + 20)²
(18)²
= 324
C. 2xy - 3y
2.(-2).10 - 3.10
(-40) - 30
= -70
Semoga membantu
y = 10
a)
5x - y
= 5(-2) - 10
= -10 - 10
= -20
b)
(x + 2y)^2
= (-2 + 2(10))^2
= (-2 + 20)^2
= 18^2
= 324
c)
2xy - 3y
= 2(-2)(10) - 3(10)
= -40 - 30
= -70