ria2389
ria2389 ria2389
  • 01-04-2019
  • Mathematics
contestada

Plz help me i need it

Plz help me i need it class=

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tramserran
tramserran tramserran
  • 02-04-2019

Answer:   25x⁴ - 49

Step-by-step explanation:

  (5x² - 7)(5x² + 7)

= 5x²(5x² + 7)  - 7(5x² + 7)

= 25x⁴ + 35x² - 35x² - 49

= 25x⁴ + (       0      )  - 49

= 25x⁴ - 49

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