A) 16x²-(4х-5)²=15
16x²-16x²+40х-25-15=0
40х-40=0
40x=40
x=1
Б) -5*x*2+15*x+10*x-10+20=0
-5*x*2+25*x+10=0
x 2-5*x-2=0
d=25+8=33
X1=(5+/33) /2
X2=(5-/33) /2
В)64x-(3-8x)²=87
64x²-1(3-8x)²=87
64x²-1(-8x+3)²=87
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A) 16x²-(4х-5)²=15
16x²-16x²+40х-25-15=0
40х-40=0
40x=40
x=1
Б) -5*x*2+15*x+10*x-10+20=0
-5*x*2+25*x+10=0
x 2-5*x-2=0
d=25+8=33
X1=(5+/33) /2
X2=(5-/33) /2
В)64x-(3-8x)²=87
64x²-1(3-8x)²=87
64x²-1(-8x+3)²=87