Question

T ao quadrado - 9t =10

Answer 1

t^2-9t-10=0 ∆=49-40=9 t'=(9+3)/2=12/2 t'=6 t"=(9-3)/2=6/2 t"=3

Answer 2

t²-9t=10
t²-9t-10=0
∆=b²-4.a.c
∆=9²-4.1.(-10)
∆=81+40
∆=121

t=(-b+/-√∆)/2.a
t=(9+/-√121)/2
t=(9+/-11)/2

t1=(9+11)/2
t1=20/2=10

t2=(9-11)/2
t2=-2/2=-1

xD