M=k*4+2
n=i*4+2
mn=ik*16+8(i+k)+4
mn/4=4ik+2(i+k)+1, т.е. mn кратно 4.
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1) 5у²-6у+1=0
Д=(-6)²-4*5*1=36-20=16=4²
у₁=<u>6-4 </u>= <u> 2 </u>= <u>1 </u>=0,2
2*5 10 5
у₂=<u>6+4 </u>= 1
10
Ответ: 0,2; 1.
2) 2у²-9у+10=0
Д=(-9)²-4*2*10=81-80=1
у₁=<u>9-1 </u>=<u> 8 </u>= 2
2*2 4
у₂=<u>9+1</u>=2,5
4
Ответ: 2; 2,5.
4у куб х + 8ух в квадрате=4ух(у квадрат+4х)