22-05-2020
Mathematics

contestada

solve the equation -t^2+2t+15=0

Respuesta :

valerieulbrich valerieulbrich

22-05-2020

Answer:

t=-3, t=5

Step-by-step explanation:

what 2 numbers multiply to -15 (A*C) and add to 2 (B)

5*-3

so the factor are (-t+5)(t+3)=0, set each factor equal to zero and solve.

-t+5=0, t=5

t+3=0, t=-3

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