Multiple choice The value of ( a + b)2+(a -b)2 is 2a2b2 2a2 + b2 2( a2+b2) 4ab Reveal answer Fill a bubble to check yourself C Correct answer Explanation Expand both squares: (a^2 + 2ab + b^2) + (a^2 - 2ab + b^2). The 2ab and -2ab cancel out, leaving 2a^2 + 2b^2, which is 2(a^2 + b^2).