8 square ft you would just multiply to find area
Answer:
B
Step-by-step explanation:
x² + 9x
to complete the square
add ( half the coefficient of the x- term )² to x² + 9x
= x² + 2(
)x + (
)²
= x² + 9x +
← the value of c
= (x +
)² ← a perfect square
6+9=15
y+9=x
x=30
y+9=30
y=21
8 and 7 are both a factor of 56.