Zapisz w postaci sumy algebraicznej pole :
a) prostokąta o bokach x+5 i x-2
b) trójkąta o podstawie x+3 i wysokości x-3
c) trapezu o podstawach x, x+2 i wysokości x+1
Zapisz w najprostszej postaci
3(a+b)+(a=2b)
-4(x-z)-(z+y)
5(4x-7)+(7-4x)
(4x-y)-2(x+y)
2(3x-2y+3z+5(x-y-z)
4x(x-y-z)-2x(4x-y-z)
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x+5*x-2=x2-2x+5x-10=x2+3x-10
x+3*x-3/2=x-9/2
x+x+2*x+1/2=4x+1/2
a)(x+5)(x-2)=x^2-2x+5x-10=x^2+3x-10
b)1/2(x+3)(x-3)=1/2(x^2-9)=1/2x^2-9/2
c)1/2(x+x+2)(x+1)=1/2(2x+2)(x+1)=(x+1)(x+1)=(x+1)^2=x^2+2x+1
3(a+b)+(1+2b)=3a+3b+1+2b=3a+5b+1
-4(x-z)-(z+y)=-4x+4z-z-y=-4x-y+3z
5(4x-7)+(7-4x)=20x-35+7-4x=16x-28
(4x-y)-2(x+y)=4x-y-2x-2y=2x-3y
2(3x-2y+3z)+5(x-y-z)=6x-4y+6z+5x-5y-5z=11x-9y+z
4x(x-y-z)-2x(4x-y-z)= 4x^2-4xy-4xz-8x^2+2xy+2xz=-4x^2-2xy-2xz