Answer:
i dont know
Step-by-step explanation:
Answer:
We have been given an equation 
We will factorize it by middle term splitting.
Step 1: 
Taking common factors out by clubing first two terms ad last two terms
Step 2: 
Step 3: 
Equating both above factors to zero as:
Step 4: 
And
.
The slope of this triangle is -2/1
X(x+3)-7(x+3)
x2+3x-7x-21
x^2-4x-21