1) resolva as equaçõesa) x²-5x-24=0b) x²+7x=0c) y²+9y+14=0d) x²+9x=0
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a)x^2+5x-24=0》a=1,b=5.,c=-24》x=-(5)+,-\/5^2-4(1)(-24)/2(1)》x=-5+,-\/25;4(;24)/2》x=-5+,-\/25+96/2》x=-5+,-\/121/2》x=-5+,-11/2》》》》》》》》》》》》》》》》x1=-5+11/2》x1=6/2》x1=3》》》》》》》x2=-5-11/2》x2=-16/2》x2=-8》》》》》b)x^2+7x=0》x(x-7)=0》x=0,x+7=0》x=0,x=-7》》》》》》》》》》》》》》c)y^2-9y+14=0》a=1,b=-9,c=14》x=-(-9)+,-\/(-9)^2-4(1)(-14)/2(1)》x=9+,-\/(-9)^2-4(1)(14)/2》x=9+,-\/81-4(14)/3》x=9+,-\/81-56/2》x=9+,-\/25/2》x=9+,-5/2》》x1=9+5/2》x1=14/2》x1=7》》》》》》》x2=9-5/2》x2=4/2》x2=2》》》》》》d)c^2+9x=0》x(x+9)=0》x=0,x-9=0》x=0,x=-9
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