SOLUTION: How to solve this algebraic question? the value of a=4,b=7 and k =11 this is part b that I can't understand: a*(squareroot b^2 -c)= 5k we need to find c. Can you giv

Algebra ->  Systems-of-equations -> SOLUTION: How to solve this algebraic question? the value of a=4,b=7 and k =11 this is part b that I can't understand: a*(squareroot b^2 -c)= 5k we need to find c. Can you giv      Log On


   

Question 847253: How to solve this algebraic question?
the value of a=4,b=7 and k =11
this is part b that I can't understand:
a*(squareroot b^2 -c)= 5k
we need to find c.
Can you give me a detailed explanation and solution to this please.thanks.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a%2Asqrt%28b%5E2-c%29=5k
4%2Asqrt%287%5E2-c%29=5%2811%29
sqrt%2849-c%29=55%2F4Divide by both sides by 4
49-c=%2855%2F4%29%5E2Square both sides
49-c=3025%2F16
c=784%2F16-3025%2F16Change 49 to a fraction with denominator of 16
c=-2241%2F16