Answer:
The value of x in the equation is:
Step-by-step explanation:
Given the equation
Subtract 2 from both sides
Subtract 54x from both sides
Divide by both sides by -20
Therefore, the value of x in the equation is:
Answer:
y = -(x+4)² +7
Step-by-step explanation:
I find it convenient to factor the leading minus sign from the first two terms, then work with what's left.
... y = -(x² +8x) -9
Now, add the square of half the x-coefficient inside parentheses. Add the opposite of that amount outside parentheses.
... y = -(x² +8x +4²) -9 +4²
... y = -(x +4)² +7 . . . . . . . . . rewrite parentheses as a square; collect terms
4, -5, 5, Zero, <span>He did not add 13 to 26</span>