ria2389 ria2389

01-04-2019
Mathematics

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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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