Объяснение:
4(4x−12)²−15(4x−12)+9=0
4(16x²-96x+144)-60x+180+9=0
64x²-384x+576-60x+189=0
64x²-444x+765=0
Δ=197136-195840=1296
√Δ=36
x1=(444-36)/128=408/128=3 3/16
x2=(444+36)/128=480/128=3 3/4 = 3,75
Объяснение:
4(4x−12)²−15(4x−12)+9=0
4(16x²-96x+144)-60x+180+9=0
64x²-384x+576-60x+189=0
64x²-444x+765=0
Δ=197136-195840=1296
√Δ=36
x1=(444-36)/128=408/128=3 3/16
x2=(444+36)/128=480/128=3 3/4 = 3,75