1. 2-9x^2=0 2. -15-2x^2=-11x 3. -0,36-x^2=0 4. - вопрос №12920215221130362041664251332146723072371061 от Opasnaya2001 23.08.2022 04:10

Question

Алгебра: 1. 2-9x^2=0 2. -15-2x^2=-11x 3. -0,36-x^2=0 4. 16x+64=-x^2 5. 13x+3x^2=-14 6. 7x^2-3x=0 7. 5=2x-x^2 8. 16+x^2=8x 9. 1-4x^2+3x=0 10. -12x+4=-9x^2 11. 10x^2-2=x

Opasnaya2001 · Answer

1)2-9x^2=09x^2=2x^2=2/9x1=sqr2/3x2=-sqr2/32)-15-2x^2=-11x-2x^2+11x-15=0d=121-4(-2)(-15)=121-120=1x1=(-11-1)/2=-6x2=(-11+1)/2=-53)-0.36-x^2=0(-1)x^2=0,36x^2=-0,36 такого быть не может.4) 16x+64=-x^2x^2+16x+64=0d=256-4*1*64=256-256=0x=-16/2=-85) 13x+3x^2=-143x^2+13x+14=0d=169-4*3*14=169-168=1x1=(-13-1)/6=-14/6=-7/3x2=(-13+1)/6=-12/6=-26) 7x^2-3x=0x(7x-3)=0x1=0x2=7x-3=0x2=3/77)5=2x-x^2x^2-2x+5=0d=4-4*5=4-20  d 0 корней нет8)16+x^2=8xx^2-8x+16=0d=64-4*16=64-64=0x=8/2=49)1-4x^2+3x=0-4x^2+3x+1=0d=9-4*(-4)=9+16=25=5^2x1=(-3+5)/(-8)=-1/4x2=(-3-5)/(-8)=110)...