( 7.5 × 7.5 + 37.5 + 2.5 × 2.5 ) is equal to :
solution given expression = ( 7.5 × 7.5 + 2 × 7.5 × 2.5 + 2.5 × 2.5 ) = ( a 2 + 2 ab + b 2 ) = ( a + b ) 2 = ( 7.5 + 2.5 ) 2 = 102 = 100 . answer d
add(add(multiply(7.5, 7.5), multiply(2.5, 2.5)), 37.5)