Diego measures the length of a pen to be 20 set to actually length of a pen is 25 cm find the percentag error. Explain your thinking.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

step-by-step explanation:

i found the koficent of the linear function and i foun c acordind to the strict formula y=kx+c and then i took 2 as an x and replacet it on the formula i found and then foun the y

i think the answer is d im not sure