Aplica la formula general en las siguientes ejercicios

a)4x^2 = 9x - 2
b) 5x^2 - 9x= -4
c)2x^2 + x = 55
d)3x^2 - 8x= 3
e) 7x^2 - 3x = 4
f)4x^2 - 10x= 6
g)5x^2 = 3x + 14
h) 8x^2 = x + 7
i)3x^2 = 10x +25
j) x^2 + 9x - 10

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 )