Find the square of the following:- (2x+5), (3x-5), (x-1/x), (2x+3/y)
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Answer:
i 2x+5
(2x+5)²
(2x)²+(5)²+2(2x)(5)
4x²+25+20x
ii 3x-5
(3x-5)²
(3x)²+(5)²-2(3x)(5)
9x²+25-30x
iii x-1/x
(x-1/x)²
x²+(1/x)²-2(x)(1/x)
x²+1/x²-2
iv 2x+3/y
(2x+3/y)²
(2x)²+(3/y)²+2(2x)(3/y)
4x²+9/y²+12x/y
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