Answer:


Step-by-step explanation:
2x² +21x-61 = (x+7)²
expand
2x² + 21x - 61 = x² + 14x +49
move everything to one side
x² + 7x - 12 = 0
use quadratic formula

plug in the values

solve



Answer:
y=3
Step-by-step explanation:
4y-1=11
+1 +1
4y=12
/4 /4
y=3
Answer:
multiply by 32
Step-by-step explanation: