Объяснение:
(5х+2)(х+7)=(х-1)(4х+13)
5х²+35х+2х+14=4х²+13х-4х-13
5х²+37х+14=4х²+9х-13
х²+28х+27=0
D=784-4*27=676
x1=(-28+26)/2=-1
x2=(-28-26)/2=-27
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Объяснение:
(5х+2)(х+7)=(х-1)(4х+13)
5х²+35х+2х+14=4х²+13х-4х-13
5х²+37х+14=4х²+9х-13
х²+28х+27=0
D=784-4*27=676
x1=(-28+26)/2=-1
x2=(-28-26)/2=-27