Question

1)quais equações são do 2 grau?a)x+5x2=2b)5-3x=x2 c)10×+40=7d)7/2x+1=21xe)-x2+18=5+4x2f)3x+16=12-xg)x2+3=5x2+1h)0x2+3x=0

Answer 1

a)x+5x2=2

b)5-3x=x2

e)-x2+18=5+4x2

g)x2+3=5x2+1