Помогите 3х2–14х+16=0 4х2–36х+77=0 25х2=10х–1 6х(2х+1)=5х+1

1)3х²–14х+16=0 D=(-14)²-4·3·16=196-192=4
x₁=(14-2)/6=2    или  х₂=(14+2)/6=8/3

<span> 2)4х²–36х+77=0
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<span>D=(-36)²-4·4·77=1296-1232=64
x₁=(36-8)/8=28/8=3,5    или  х₂=(36+8)/8=44/8=5,5
 
3)25х²-10х+1=0
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<span>D=(-10)²-4·25·1=0
x₁=</span><span><span><span>х₂=</span>(10-0)/50=0,2  

4)</span> 6х(2х+1)=5х+1
12х²+6х=5х+1
12х²+х-1=0
D=1²-4·12·(-1)=49
</span><span>x₁=(-1-7)/24=-1/3    или  х₂=(-1+7)/24=1/4</span>