Its C. He substituted incorrectly when calculating the constant of variation.
Reason: He said so
Y-y1=m(x-x1)
y+18=1(x+8)
y=x-10
parallel lines have the same slope
What does it want you to do
Answer:
for example 2x + 5=15
first thing collect the like term
2x=15-5
=10
2x=10
divide bothside by 2
x=10\2
x=5
Answer:
2x(x+y)(x-y)
Step-by-step explanation:
Given the expression;
(x+y)² + 2(x+ y)(x- y) + (x– y)²
Factorize
(x+y)² + (x+ y)(x- y) + (x+ y)(x- y) + (x– y)²
= (x+y)[x+y+(x-y)] +(x-y)[(x+y)+(x-y)]
= (x+y)(x-y)(x+y+(x-y))
= (x+y)(x-y)(x+y+x-y)
= (x+y)(x-y)(2x)
hence the expanded form is 2x(x+y)(x-y)
