Odpowiedź:
a) 2x (x+3y) - 6y (x-2y) - 8y²
2(x*(x+3y)-3y*(x-2y)-4y^2)
1(x^2+3xy-3xy+6^2-4y^2)
2(x^2+2y^2)
b) (5x+y) (-x-y)
5x*x-5xy-xy-y*y
-5x^2-5xy-xy-y^2
-5x^2-6xy-y^2
c) -6a + 2 (3a-b) - 4 (-2a + b)
-2(3a-(3a-b)+2(-2a+b))
-2(3a-3a+b-4a+2b)
-2(3b-4a)
Szczegółowe wyjaśnienie:
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Odpowiedź:
a) 2x (x+3y) - 6y (x-2y) - 8y²
2(x*(x+3y)-3y*(x-2y)-4y^2)
1(x^2+3xy-3xy+6^2-4y^2)
2(x^2+2y^2)
b) (5x+y) (-x-y)
5x*x-5xy-xy-y*y
-5x^2-5xy-xy-y^2
-5x^2-6xy-y^2
c) -6a + 2 (3a-b) - 4 (-2a + b)
-2(3a-(3a-b)+2(-2a+b))
-2(3a-3a+b-4a+2b)
-2(3b-4a)
Szczegółowe wyjaśnienie: