PROSZE O ZROBIENIE TYCH ZADAŃ ;P KSIĄŻKA TO PROSTO DO MATURY ZAKRES PODSTAWOWY
a. 5(x+1)+7(x-1)-3(x^2+x)=5x+5+7x-7-3x^2-3x=9x - 3x^2 - 2
b. 2(3x^2-3)+(2x+1)(2-x)=6x^2-6+4x-2x^2+2-x=4x^2+3x-4
c.7x(1/7x - 6/7)-1/5(5x+5)(x-1)=x^2-6x-1/5(5x^2-5x+5x-5)=x^2-6x-x^2+1x-1x+1=-4x+1
d.(5x-2)(3x-1)-3(x-1)(2x+3)=15x^2-5x-6x+2-3(2x^2+3x-2x-3)=15x^2-11x+2-6x^2-9x+6x+9=9x^2-14x+11
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a. 5(x+1)+7(x-1)-3(x^2+x)=5x+5+7x-7-3x^2-3x=9x - 3x^2 - 2
b. 2(3x^2-3)+(2x+1)(2-x)=6x^2-6+4x-2x^2+2-x=4x^2+3x-4
c.7x(1/7x - 6/7)-1/5(5x+5)(x-1)=x^2-6x-1/5(5x^2-5x+5x-5)=x^2-6x-x^2+1x-1x+1=-4x+1
d.(5x-2)(3x-1)-3(x-1)(2x+3)=15x^2-5x-6x+2-3(2x^2+3x-2x-3)=15x^2-11x+2-6x^2-9x+6x+9=9x^2-14x+11