Factories 25x² -9y² and 49a²+70ab+25b²
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Step-by-step explanation:
(25x^2-9y^2)
(49a^2+70ab+25b^2)
The contents of the 1st bracket are in the formula a^2-b^2=(a+b)(a-b)
a=5x
b=3y
(5x+3y)(5x-3y)
The contents of he second bracket are in the formula (a+b)^2=a^2+2ab+b^2
a=7a
b=5b
(7a+5b)^2
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