Przedstaw w postaci sumy algebraicznej.
a) -(x+1)^2-x(x+2)=
b)(4-a)(5+a)+(6-a)(7+a)=
c)-(x+2y)+(-6x-9y)+(x+1)(X-1)=
d)5-(x+1)* 2+(2x-3)(x+4)=
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a) -(x+1)^2-x(x+2)=-(x^2+2x+1)-x^2-2x=-x^2-2x-1-x^2-2x=-2x^2-1-4x
b)(4-a)(5+a)+(6-a)(7+a)=20+4a-5a-a^2+42+6a-7a-a^2=-2a-2a^2+62
c)-(x+2y)+(-6x-9y)+(x+1)(X-1)=-x-2y-6x-9y-x^2-1=-x^2-7x-11y-1
d)5-(x+1)* 2+(2x-3)(x+4)=5-(x^2+2x+1)+2^x2+8x-3x-12=-5x^2-2x-5+2^x2+8x-3x-12
=7x^2+3x-17