Question

Va rog frumos sa ma ajutati!!!
a)(x-1)(x+1)(x²+1)-(x-3)(x+3)(x²+9)
b)(x²-5)+(3x²+4)²-2(2x²+3)(2x²-3)
Ofer coroana cel mai bun raspuns si 20 de puncte!Va multumesc anticipat!

Answer 1

a)( x^{2} -1 ^{2} )( x^{2} + 1 ^{2} )- (x^{2}- 9})( x^{2} +9) = (x^{4} -1) - ( x^{4} - 9) $= x^{4}- 1 - x^{4} + 9 = 8$