Angelina factored (x - 4) 8 and wrote that it was equal to (x2 - 42) 2 (x2 + 42). Use complete sentences to explain how you could confirm whether Angela's solution is correct. Prove your conclusion mathematically.

Question

Mathematics

Cali

28 February, 03:47

Angelina factored (x - 4) 8 and wrote that it was equal to (x2 - 42) 2 (x2 + 42). Use complete sentences to explain how you could confirm whether Angela's solution is correct. Prove your conclusion mathematically.

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Joseph Eaton · Answer 1

Angela's solution is incorrect b/c when multiplied you get a completely different answer then the one she had.

(x^2 - 4^2) ^2 = x^4 - 4^4

(x^4 - 4^4) (x^2 + 4^2) = x^2 - 4^6