Wouldn’t another solution (and debatably an easier one) be to just solve for x? Subtract both sides by 4, divide by -1, square root both sides, and get +2=x – 7 and -2 = x – 7. Therefore x=5 and x=9?

I dont get that “If you know the normal shape of a parabola with a leading coefficient of 1 or –1, then you know it will travel 2 units left or right as it travels 4 units down to the x-axis. ” I only know -1 coefficient will be down sloping and +1 will be up sloping.

## Comments (3)

Wouldn’t another solution (and debatably an easier one) be to just solve for x? Subtract both sides by 4, divide by -1, square root both sides, and get +2=x – 7 and -2 = x – 7. Therefore x=5 and x=9?

Sure, that works too!

I dont get that “If you know the normal shape of a parabola with a leading coefficient of 1 or –1, then you know it will travel 2 units left or right as it travels 4 units down to the x-axis. ” I only know -1 coefficient will be down sloping and +1 will be up sloping.