Question

# Q.2 .: x² +38-4 Ifx is real then find the range of y=- x? +7x +12

Solution

y=x²+3x-4 + XER
22+72+12 arte
y = x²+42-*-4 d ana
x² + 3x +42+12
y = (x+4) (2-) t ahunan
(x+3)(x+4)
a cannot be o
RE(-00,-3) U. (-3,-4) U (-4,00)
| Ans