Proszę doprowadzić wyrażenia do najprostszej postaci.
a)-(2-x)do kwadratu -8(1-x)do kwadratu +5(1+x)(1-x)
b)(3x-4)(5x+1)-(3x-4)do kwadratu+2(5x+1)do kwadratu+(x-2)(x+2)
c)(2a-5b)do kwadratu-4(2a+5b)do kwadratu+(5b-3)(3b-2)-(2a-5)(2a+5)
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a)-(2-x)² -8(1-x)² +5(1+x)(1-x)=
=-(4-4x+x²)-8(1-2x+x²)+5(1-x²)=
=-4+4x-x²-8+16x-8x²+5-5x²=
=-7+20x-14x²
b)(3x-4)(5x+1)-(3x-4)²+2(5x+1)²+(x-2)(x+2)=
=15x²+3x-20x-4-(9x²-24x+16)+2(25x²+10x+1)+x²-4=
=15x²+3x-20x-4-9x²+24x-16+50x²+20x+2+x²-4=
=57x²+27x-22
c)(2a-5b)²-4(2a+5b)²+(5b-3)(3b-2)-(2a-5)(2a+5)=
=4a²+20ab+25b²-4(4a²+20ab+25b²)+15b²-10b-9b+6-(4a²-25)=
=4a²+20ab+25b²-16a²-80ab-100b²+15b²-10b-9b+6-4a²+25=
=-16a²-60ab-60b²-19b+31
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