Answer:
9,833,923
Step-by-step explanation:
Subtract 9,089,689 from 18,923,612
The sum is the answer to an addition problem. Since we know the sum involves addition, we write an addition equation between the variable and the number given to us.
6 + n (number that was not given to use) = 23
X^2 - 10x + 25 = 18. Send 18 to the other side. The equation becomes :
x^2 -10x + 7 = 0 Now solve for x, using the quadratic formula.
x = (-b +- /b^2 - 4ac)/2a
{+- (plus minus) /(square root) } Note: the square root is 4 the whole (b^2 - 4ac) from equation : x^2 -10x + 7 = 0 a=1, b= -10, c=7 Replace the values of a,b&c in the quadratic equation.
x = (10+-/((-10)^2 - (4*1*7))/2) = ( 10 + /72 )/2. [Simplify it on your own, here it seems to be pretty weird with these: +- and / as square root.] Well, at the end you should obtain x=(10 +- square root of 72) divided by 2
either: x = (10 + /72) divided by 2 = 9.24
or : x = ( 10 - /72) divided by 2 = 0.757
Pretty long explanation!!!!!!!