Answer: 0.38065
in simpler terms x=± 0.145 =±0.38065
Step-by-step explanation: -490x2+71 = 0
Subtract 71 from both sides of the equation :
-490x2 = -71
Multiply both sides of the equation by (-1) : 490x2 = 71
Divide both sides of the equation by 490:
x2 = 71/490 = 0.145
When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:
x = ± √ 71/490
The equation has two real solutions
These solutions are x = ±√ 0.145 = ± 0.38065
Answer: it's 1 :)
Step-by-step explanation:
Yes, the common factor is (2x+5) and the equation can be expressed as:
(x^3-4)(2x+5)
Answer:
6
Step-by-step explanation:
Amu of unknown element = 40 - (20% * 40)
= 40 - 8
= 38 amu
therefore, the approximate weight of the unknown element is 38 amu.
hope this helps.
