Uprość wyrażenie a) (x+3)(x-3)-(x+4)^2+(5x-1)^2 b) -(-3x-5)^2-(-x-6)^2
a) = x^2 -9 -(x^2+8x+16)+25x^2-10x+1=
=x^2 -9 -x^2 -8x -16 + 25x^2 -10x +1=
=25^2-18x-24
b)
=-(9x^2+30x+25) - (x^2 +12x+36)=
= -9x^2 -30x -25 -x^2 -12x -36=
=-10x^2 -42x^2-61
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a) = x^2 -9 -(x^2+8x+16)+25x^2-10x+1=
=x^2 -9 -x^2 -8x -16 + 25x^2 -10x +1=
=25^2-18x-24
b)
=-(9x^2+30x+25) - (x^2 +12x+36)=
= -9x^2 -30x -25 -x^2 -12x -36=
=-10x^2 -42x^2-61