Rozwiążcie proszę szybkooo xD wzory skroconego mnozenia xD
Wykonaj działania
a)(4x-5)^ + (5+4x)^
b)(2x-1)^ - 4(x-3)(x+3)
c)(x+2y)^-(x+2y)(x-2y)+2(x-2y)^+4xy
d)(a-2b)(3a+b)-3(a-b)^
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a) (4x-5)^ + (5+4x)^= 16x^ - 20x + 25 + 25 + 20x + 16x^= 32x^ + 50
b) (2x-1)^ - 4(x-3)(x+3)=4x^ - 4x + 1 - 4(x^-9)=4x^ - 4x +1 -4x^+36= -4x + 37
c) (x+2y)^-(x+2y)(x-2y)+2(x-2y)^+4xy= x^ + 4xy + 4y^ - x^ + 4y^ +2(x^ - 4xy + 4y^) + 4xy=4xy + 8y^ + 2x^ - 8xy + 8y^ + 4xy = 2x^ + 8y^
d)(a-2b)(3a+b)-3(a-b)^= 3a^ + ab - 6ab -2b^ -3(a^ - 2ab + b^) = 3a^ - 5ab - 2b^ - 3a^ + 6ab - 3b^= ab - 5b^
Mam nadzieje, że dobrze :)