PRODUTOS NOTAVEIS
(a) (x + y) ²
(b) (a + 7)²
(c) (3x + 1)²
(d) (10x + y)²
Soluções para a tarefa
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a)(X+Y)²=
(X+Y)*(X+Y)=
X²+XY+YX+Y²=
X²+2XY+Y²
b)(a+7)²=
(a+7)*(a+7)=
a²+7a+7a+49=
a²+14a+49
c)(3X+1)²=
(3X+1)*(3X+1)=
9X²+3X+3X+1=
9X²+6X+1
d)(10X+Y)²=
(10X+Y)*(10X+Y)=
100X²+10XY+10XY+Y²=
100X²+20XY+Y²
(X+Y)*(X+Y)=
X²+XY+YX+Y²=
X²+2XY+Y²
b)(a+7)²=
(a+7)*(a+7)=
a²+7a+7a+49=
a²+14a+49
c)(3X+1)²=
(3X+1)*(3X+1)=
9X²+3X+3X+1=
9X²+6X+1
d)(10X+Y)²=
(10X+Y)*(10X+Y)=
100X²+10XY+10XY+Y²=
100X²+20XY+Y²
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