Question

use suitable identies to find the following products is:-
1)(x-8)(x+11)
ii)(y⁴+11/3)(y⁴-11/3)

Answer 1

i)

$(x + a)(x + b) = x^{2} + (a + b)x + ab$

using this formula,

$(x - 8)(x + 11) \\ x^{2} + (( - 8) + 11)x + ( - 8)(11) \\ x^{2} + 3x - 88$