Answer:
Letter B
Step-by-step explanation:
X^2 +mx +m = (x+2 )^2
since (x+2)^2 = x^2 +2(2x) + 2^2
= x^2 + 4x + 4
therefore the answer is m= 4
C
A body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
Y = 30 - 2(2)
y= 30 - 4
y = 26