(4x+y)²=(4x)²+2×4x×y+(y)²=16x²+8xy+y²
(2a+3b)²=(2a)²+2×2a×3b+(3b)²=4a²+12ab+9b²
(5+6m)²=(5)²+2×5×6m+(6m)²=25+60m+36m²
(x+2y)²=(x)²+2×x×2y+(2y)²=x²+4xy+4y²
(8x+3)²=(8x)²+2×8x×3+(3)²=64x²+48x+9
(10x-7y)²=(10x)²+2×10x×(-7y)+(-7y)²=100x²-140xy+49y²
(4x+y)²=(4x)²+2×4x×y+(y)²=16x²+8xy+y²
(2a+3b)²=(2a)²+2×2a×3b+(3b)²=4a²+12ab+9b²
(5+6m)²=(5)²+2×5×6m+(6m)²=25+60m+36m²
(x+2y)²=(x)²+2×x×2y+(2y)²=x²+4xy+4y²
(8x+3)²=(8x)²+2×8x×3+(3)²=64x²+48x+9
(10x-7y)²=(10x)²+2×10x×(-7y)+(-7y)²=100x²-140xy+49y²