a)x^2 + 2x + 1 - (x^2 - 4x + 3) = x^2 + 2x + 1 - x^2 + 4x - 3 = 2x + 1 + 4x - 3 = 6x + 1 - 3 = 6x - 2
b) -10x - 15 - 3(5 - 3x) = -10x - 15 - 15 + 9x = -x - 15 - 15 = -x - 30
c) 2x^3 - 10x^2 - 3x *(x^2 - 3x + 5) = 2x^3 - 10x^2 - 3x^3 + 9x^2 - 15x = -x^3 - 10x^2 + 9x^2 - 15x = -x^3 - x^2 - 15x
d) x - (y - x + y - x) = x - (2y - x - x)) = x - (2y - 2x) = x - 2y +2x = 3x - 2ye
e) (2y - 1)* 7/2 - 1/2*(-1/2) = (2y - 1)* 7/2 + 1/2*1/2 = (2y - 1)* 7/2 + 1/4 = 7y - 7/2 + 1/4 = 7y - 13/4
Jeśli chodzi o podpunkt e) to nie jestem pewien ;)
Liczę na naj!
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a)x^2 + 2x + 1 - (x^2 - 4x + 3) = x^2 + 2x + 1 - x^2 + 4x - 3 = 2x + 1 + 4x - 3 = 6x + 1 - 3 = 6x - 2
b) -10x - 15 - 3(5 - 3x) = -10x - 15 - 15 + 9x = -x - 15 - 15 = -x - 30
c) 2x^3 - 10x^2 - 3x *(x^2 - 3x + 5) = 2x^3 - 10x^2 - 3x^3 + 9x^2 - 15x = -x^3 - 10x^2 + 9x^2 - 15x = -x^3 - x^2 - 15x
d) x - (y - x + y - x) = x - (2y - x - x)) = x - (2y - 2x) = x - 2y +2x = 3x - 2ye
e) (2y - 1)* 7/2 - 1/2*(-1/2) = (2y - 1)* 7/2 + 1/2*1/2 = (2y - 1)* 7/2 + 1/4 = 7y - 7/2 + 1/4 = 7y - 13/4
Jeśli chodzi o podpunkt e) to nie jestem pewien ;)
Liczę na naj!