Explicación paso a paso:
a) (a+4)²
(a)²+2(a)(4)+(4)²
a²+8a+16
b) (3x+2y)²
(3x)²+2(3x)(2y)+(2y)²
9x²+12xy+4y²
c) ( 3 a+ 1 b)²
5 2
( 3 a)²+2( 3 a)( 1 b)+( 1 b)²
5 5 2 2
9 a²+ 6 ab+ 1 b²
25 10 4
d) (3x+2x)²
(5x)²
25x²
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Verified answer
Explicación paso a paso:
a) (a+4)²
(a)²+2(a)(4)+(4)²
a²+8a+16
b) (3x+2y)²
(3x)²+2(3x)(2y)+(2y)²
9x²+12xy+4y²
c) ( 3 a+ 1 b)²
5 2
( 3 a)²+2( 3 a)( 1 b)+( 1 b)²
5 5 2 2
9 a²+ 6 ab+ 1 b²
25 10 4
d) (3x+2x)²
(5x)²
25x²