Carly solved a quadratic equation by completing the square, but her work has errors.
a(i + 4) = 117
12 + 40 = 117
x2 + 40 + 42 = 117 + 42
12 + 40 + 16 = 117 + 16
(1 + 4) = 133
+ 4 = + v133
i= -4 = v133
identify the first error in carly's work.
a. she did not rewrite the equation and set it equal to 0 as a first step.
b. she put the symbol in the wrong place after taking the square root.
c. she should have subtracted the value from the right side of the equation instead of adding.
d. she added the wrong value to both sides of the equation to complete the square.

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )