Ответ:
3)4x²-12x-5|2x-3|+15=0;
a)|2x-3|>0; 4x²-12x-5(2x-3)+15=0;
4x²-12x-10x+15+15; 4x²-22x+30=0; D=484-480=4
x1=(22-2)/8=20/8=2,5; x2=(22+2)/8=3
b)|2x-3|<0; 4x²-12x-5(3-2x)+15=0
4x²-12x-15+10x-15=0; 4x²-2x=0; 2x(2x-1)=0
x1=0; x2=1/2
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Verified answer
Ответ:
3)4x²-12x-5|2x-3|+15=0;
a)|2x-3|>0; 4x²-12x-5(2x-3)+15=0;
4x²-12x-10x+15+15; 4x²-22x+30=0; D=484-480=4
x1=(22-2)/8=20/8=2,5; x2=(22+2)/8=3
b)|2x-3|<0; 4x²-12x-5(3-2x)+15=0
4x²-12x-15+10x-15=0; 4x²-2x=0; 2x(2x-1)=0
x1=0; x2=1/2