Cameron claims that (x2 + y2)2 is equivalent to (x2 - y2)2 + (2xy)2. Which of the following statements BEST describes Cameron's claim?
A. The claim is only true when x = y = 0 since the expressions are both equal to 0 for these values
B. The claim is true for all values of x and y since (x2 + y2)2 = (x2 - y2)2 + (2xy)2 is a polynomial identity.
C. The claim is only true when x 2 y since the value of x2 - y2 is negative otherwise.
D. The claim is never true since x2 + y2 is not equivalent to x2 + 2xy - y2.

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 )

All you have to do is multiply