Answer:
second option
Step-by-step explanation:
Given
+ 6x² + 5 = 0
let u = x², then
u² + 6u + 5 = 0 ← in standard form
(u + 1)(u + 5) = 0 ← in factored form
Equate each factor to zero and solve for u
u + 1 = 0 ⇒ u = - 1
u + 5 = 0 ⇒ u = - 5
Change u back into terms of x, that is
x² = - 1 ( take the square root of both sides )
x = ±
= ± i ( noting that
= i ), and
x² = - 5 ( take the square root of both sides )
x = ±
= ±
= ±
×
= ± i
Solutions are x = ± i and x = ± i
16.45-10=6.54
6.45÷.15=43
he sold 43 newspapers that morning
I hope this helps :)
Answer:
Step-by-step explanation:
11x-3+5x-9=180
16x-12=180
16x=192
x=12
<pst=129
15% of 4,000,751,546,368= 15/100x4,000,751,546,368 = 600,112,731,955.6
Answer: 6 pieces
Step-by-step explanation: