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35 votes
35 votes
I was just wondering how he got the 14y thank u!

I was just wondering how he got the 14y thank u!-example-1
User Zaquest
by
2.7k points

1 Answer

13 votes
13 votes

Given equation is:


3y^2+(y+7)^2-15

let us simplify,

use the formula


(a+b)^2=a^2+2ab+b^2
\begin{gathered} 3y^2+(y+7)^2-15^{} \\ 3y^2+(y^2+2\cdot7\cdot y+7^2)-15 \\ 3y^2+y^2+14y+49-15 \\ 4y^2+14y+34 \end{gathered}

The answer is


4y^2+14y+34

User RyanKeeter
by
3.2k points