Answer: 21
Step-by-step explanation:
2x^2+20x = -38
2x^2 + 20x + 38 = 0
Divide both sides by 2.
x^2 + 10x + 19 = 0
The quadratic formula works very well here.
Let a = 1, b = 10 and c = 19
x = [-b +- sqrt{b^2 - 4ac}]/(2a)
Plug those values into the formula to find two answers for x.
One is negative and the other positive.
Good luck.
Question: <em>What is 0.03 </em>× 2.06?
Just multiply the two numbers like normal numbers. Make sure you line up the decimal points, and use a zero if you need placeholders.
Then, the number of decimal places in both numbers are added together in the result. (As you can see, 2 places in each number, 4 in the result)
<span>₁</span>
2.06
<u> ×0.03</u>
0.0618
sorry i cant help on that its tricky but try 8???