(-3+3root7)(3root7+3)

1.	(-3+3root7)(3root7+3)
Answer» (-3+3root7) (3root7+3 ) Formula : (a+b) (a-b) = a² - b²We put this formula here (-3)² - (3root7)² = 9 - 63= 54 (-3+3√7)(3√7+3)-3(3√7+3)+3√7(3√7+3)-9√7-9+63+9√7-9√7+9√7-9+6354 Answer

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