Skip to main content
Solve for y
Tick mark Image
Graph

Similar Problems from Web Search

Share

y^{2}-12y+36-\left(y+4\right)^{2}=0
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(y-6\right)^{2}.
y^{2}-12y+36-\left(y^{2}+8y+16\right)=0
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(y+4\right)^{2}.
y^{2}-12y+36-y^{2}-8y-16=0
To find the opposite of y^{2}+8y+16, find the opposite of each term.
-12y+36-8y-16=0
Combine y^{2} and -y^{2} to get 0.
-20y+36-16=0
Combine -12y and -8y to get -20y.
-20y+20=0
Subtract 16 from 36 to get 20.
-20y=-20
Subtract 20 from both sides. Anything subtracted from zero gives its negation.
y=\frac{-20}{-20}
Divide both sides by -20.
y=1
Divide -20 by -20 to get 1.