Answer:
14) L = 9
15) x = 5/4
Step-by-step explanation:
14) Since there is a square root, we have to turn this into a quadratic equation.
L² - 5L - 36 = 0
Solve
L² - 9L + 4L - 36 = 0
L(L - 9) + 4(L - 9) = 0
(L + 4)(L - 9) = 0
The answer is -4 and 9 but since the length of a room cannot be negative, the length is only 9.
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15) Set the equation equal to 0 and solve.
4x - 5 = 0
4x = 5
x = 5/4
