X^2 + x = 5
hope that helps
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Circular based pyramid I believe
Value of x will be
.
Equation given in the question → 
To find the value of 'x' in terms of a and b, we will simplify the given equation,




Therefore, Values to filled → Blank 1 = 15
Blank 2 = (a - b)
Learn more,
brainly.com/question/14318220
Step-by-step explanation:
theta = 180 - 123 = 57 degree
arc length = 2 * pi * R * ( theta / 360)
= 2 * pi * R * ( 57 / 360)
= 0.994R cm