Question

x²+70x-1225 solv it plz
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Answer 1

$\texttt{Using middle term split}$

$\mathtt{\;\;\;x²+70x+1225}$

$\mathtt{= x²+35x+35x+1225}$

$\mathtt{= x(x+35)+35(x+35)}$

$\mathtt{= (x+35) (x+35)}$

$\texttt{ \;\;\;\;\;\;\;\;\;\;\; Or}$

$\texttt{Using the formula (a+b)² = a²+2ab+b²}$

$\mathtt{x²+70x+1225}$

$\mathtt{= (x)²+2×x×35+(35)²}$

$\mathtt{= (x+35)²}$

$\mathtt{= (x+35) (x+35)}$