rozwiąż równania
d)2x kwadrat+5x-3=0
e)-6x kwadrat -7x+5=0
f)9/4x kwadrat-12x+16=0
d)delta=5kwadrat-4*2*(-3)=25-(-24)=49 pierwiastek z delty=7
x1=-5-7/2*2=-12/4=-3
x2-5+7/2*2=2/4=1/2
e) delta=(-7)kwadrat-4*(-6)*5+49-(-120)=169 pierwiastek z delty=13
x1=-(-7)-13/2*(-6)=-6/-12=1/2
x2=-(-)=13/2*(-6)=20/-12= - 1 i 8/12
f)delta=-12 kwadrat - 4*9/4*16=144-144=0
x=-(-12)/2*9/4=12/(ułamek ->) 9/2
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d)delta=5kwadrat-4*2*(-3)=25-(-24)=49 pierwiastek z delty=7
x1=-5-7/2*2=-12/4=-3
x2-5+7/2*2=2/4=1/2
e) delta=(-7)kwadrat-4*(-6)*5+49-(-120)=169 pierwiastek z delty=13
x1=-(-7)-13/2*(-6)=-6/-12=1/2
x2=-(-)=13/2*(-6)=20/-12= - 1 i 8/12
f)delta=-12 kwadrat - 4*9/4*16=144-144=0
x=-(-12)/2*9/4=12/(ułamek ->) 9/2