Answer:

10x² - 2 cm

Step-by-step explanation:

P = a +b +c

P = 3x²-7 + 2x²-2 + 5x²+7

=10x² -2

Answer:

Step-by-step explanation:

P = a + b + c

P = (3x² - 7) + (2x²- 2) + (5x²+ 7)

P =