A
|2x²+16x+19|=5
[2x²+16x+19=-5⇒2x²+16x+24=0⇒x2+8x+12=0⇒x1=-6 U x2=-2
[2x²+16x+19=5⇒2x²+16x+14=0⇒x²+8x+7=0⇒x=-7 U x=-1
Ответ x={-7;-6;-2;-1}
2
1)x<0
x²-7x-8=0
x1=-1
x2=8не удов усл
2)x≥0
x²+7x-8=0
x1=-8 не удов усл
x2=1
Ответ x=-1;x=1
5 х - 3 -3 х= -8 х -8
2 х +8 х= 3- 8
10 х = - 5
х = - 0,5
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(3x+4)(4x-3)-5=(2x+5)(6x-7)