Question

(3x+y-5) (3x-y-5)
$(a + b + c) = a { }^{2} + b {}^{2} + c {}^{2} + 2ab + 2bc + 2ca$
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Answer 1

Answer:

Step-by-step explanation:

3x^2 + y^2 + (-5^2) + 2*3x*y + 2*y*-5 + 2*-5*3x

do the same for the other equation

and then add the like terms