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(2ab-c)(2ab+c);
(4+3xy)(4-3xy);
(5a-3b)(5a+3b)
#2
25^2-b^2
9x^2-16y^2
49-m^2n^2
-81x^2+16y^2
36p^2-25q^2
(2ab-c)(2ab+c);
(4+3xy)(4-3xy);
(5a-3b)(5a+3b)
#2
25^2-b^2
9x^2-16y^2
49-m^2n^2
-81x^2+16y^2
36p^2-25q^2
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Verified answer
(2ab-c)(2ab+c)=4a²b²-c²(4+3xy)(4-3xy)=16-9x²y²
(5a-3b)(5a+3b)=25a²-9b²
25²-b²=(25-b)(25+b)
9x²-16y²=(3x-4y)(3x+4y)
49-m²n²=(7-mn)(7+mn)
-81x²+16y²=(4y-9x)(4y+9x)
36p²-25q²=(6p-5q)(6p+5q)