Uprość wyrażenie. a)(x+3)(x-3)-(x+4)^2+(5x-1)^2 b)-(-3x-5)^2-(-x-6)^2
a)
= x² -9 -(x²+8x+16) + 25x² -10x +1=x² -9-x²-8x-16+25x²-10x+1=25x²-18x-24
b)
=-(9x²+30x+25)-(x²+ 12x+36)=
=-9x²-30x-25-x² -12x -36=
=-10x²-42x-61
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a)
= x² -9 -(x²+8x+16) + 25x² -10x +1=x² -9-x²-8x-16+25x²-10x+1=25x²-18x-24
b)
=-(9x²+30x+25)-(x²+ 12x+36)=
=-9x²-30x-25-x² -12x -36=
=-10x²-42x-61