If x=5 and y=-5, what is the value of y2

45. It is simply putting values with due care of positive and negative signy 2 - 2y + 2x = (-5) 2 - 2(-5) +2 (5) = 25 +10+10 = 45 Key takeaway: Remember four simple rules of multiplication of positives (+) and negative (-) numbers. Pos x pos = pos 2x3 = 6 Neg x neg = pos -2 x -3 = 6 Pos x neg = neg 2 x -3 = -6 Neg x pos = neg -2 x 3= -6.

Multiple choice — select the best answer

A45
B25
C15
D55

✓ Correct answer: A. 45 It is simply putting values with due care of positive and negative signy2 - 2y + 2x = (-5)2 - 2(-5) +2 (5) = 25 +10+10 = 45 Key takeaway: Remember four simple rules of multiplication of positives (+) and negative (-) numbers. Pos x pos = pos 2x3 = 6 Neg x neg = pos -2 x -3 = 6 Pos x neg = neg 2 x -3 = -6 Neg x pos = neg -2 x 3= -6.

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