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2(m+4)² - 5(m+4)- 12= 0​

Sagot :

Answer:

x2 – 4x – 8

Step-by-step explanation:

The quadratic equation in the previous page's last example was:

(x – 2)2 – 12 = 0

The expression on the left-hand side of this equation can be multiplied out and simplified to be:

x2 – 4x – 8

But we still would not have been able to solve the equation, even with the quadratic formatted this way, because it doesn't factor and it isn't