x³ - 3x² - 9x - 5.Factorise & give whole soln
Answers
Answered by
11
by long division method we can write as
x³-3x²-9x-5
=(x²+2x+1)(x-5)
=(x+1)²(x-5) applying (a+b)^2 formulae
ny using the principle of zero products
(x+1)²=0 or x-5=0
x+1=0 or x-5+5=0+5
x=-1 or x=5
hence the values of x are -1,5
x³-3x²-9x-5
=(x²+2x+1)(x-5)
=(x+1)²(x-5) applying (a+b)^2 formulae
ny using the principle of zero products
(x+1)²=0 or x-5=0
x+1=0 or x-5+5=0+5
x=-1 or x=5
hence the values of x are -1,5
Similar questions