(25x²- 1) + (1 + 5x)²
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Step-by-step explanation:
25x²-1 +(1+5x)²
so by the formula of (a+b)² = a²+b²+2ab
25x²-1+1+25x²+10x
50x²+10x
10x(5x+1)
is the answer
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