Answer: x = - 3.5
Step-by-step explanation:
Rewrite the equation by completing the square.
4x2 + 28x + 49 = 0
Completing the square method :
Divide through by the Coefficient of x^2
x^2 + 7x + (49/4) = 0
a = 1, b = 7, c = 49/4
Move c to the right side of the equation
x^2 + 7x = - 49/4
Complete the square on the left hand side by squaring its half of the x term
(7/2)^2 = (49/4)
Add the output to both sides of the equation
x^2 + 7x + (49/4) = - (49/4) + (49/4)
(x + 7/2)^2 = 0
Square root of both sides
x + 7/2 = 0
x = - 7/2
x = - 3.5
Answer:
true
Step-by-step explanation:
baaaaam
Because the discriminant is less than zero, there are no real solutions in the equation.
To solve these types of problems, we need to convert the two values into the same form.
We know that 1 = 1.00, as adding zeroes to the end of a decimal doesn't change the value.
To change a decimal into a percentage, we multiply the decimal by 100 and add a percent sign.
1.00 * 100 = 100%
Therefore, 1 = 100%
Because 120% is greater than 100%, thus,
120% > 1
The five numbers can be represented by (2n+1), (2n+3), (2n+5), (2n+7), and (2n+9), where n is an integer.
<span>2n+9 = 15 </span>
<span>n = 3 </span>
<span>The third number is 2n+5 = 11</span>
