Ok so what you will do is 3-18 then you will add 1 and make is to 400X1
Since x=x, this is an isosceles right triangle. By the Pythagorean Theorem:
h^2=a^2+b^2 (the hypotenuse squared is equal to the sum of the squared sides)
5^2=x^2+x^2
25=2x^2
2x^2=25
x^2=25/2
x=√(25/2)
x=5/√2 now if we rationalize the denominator...
x=(5√2)/(√2√2)
x=(5√2)/2
#4 is 47, 48, 49
47+48+49=144
Do you mean ^2? cause if so... B don't really need crit points to solve, the parabola has a positive slope before x =2
