Question

Delta de
(T-1)elevado a dois+(T+2) elevado a dois -9

Answer 1

(T-1)² + (T+2)² - 9
T²-2T+1 + T²+ 4T+4-9
2T²+2T-4

∆= b²-4.a.c
∆= 2²-4.2.(-4)
∆=4+32
∆=36