Question

i) (x²+12)²−(7x)²=0 ajuda ai cla

Answer 1

$(x^2 + 12)^2 - (7x)^2\\(x^2 + 12)(x^2 + 12) - (7^2 * x^2)\\(x^4 + 12x^2 + 12x^2 + 12^2) - (7^2 * x^2)\\(x^4 + 24x^2 + 144) - 49x^2\\x^4 - 49x^2 + 24x^2 + 144\\x^4 - 25x^2 + 144$