Question 400769
{{{(2y-3)^2}}}
The First way:
Use FORMULA {{{(a-b)^2=a^2-2*a*b+b^2}}}
{{{(2y-3)^2=(2y)^2-2*(2y)*3+3^2=4y^2-12y+9}}}
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The Second way
If you didn't study that formula yet, you can use {{{a^2=a*a}}}
{{{(2y-3)^2=(2y-3)*(2y-3)=2y*2y+2y*(-3)-3*(2y)-3*(-3)=4y^2-6y-6y+9=4y^2-12y+9}}}