Answer:
12
Step-by-step explanation:
Answer:
<h2><em><u>0</u></em></h2>
Step-by-step explanation:
<em><u>The rational number 0 is the additive identity for rational numbers</u></em><em><u>.</u></em>
<em><u>As</u></em><em><u>,</u></em>
<em><u>If</u></em><em><u> </u></em><em><u>we</u></em><em><u> </u></em><em><u>add</u></em><em><u> </u></em><em><u>any</u></em><em><u> </u></em><em><u>rational</u></em><em><u> </u></em><em><u>number</u></em><em><u> </u></em><em><u>to</u></em><em><u> </u></em><em><u>zero</u></em><em><u> </u></em><em><u>we</u></em><em><u> </u></em><em><u>get</u></em><em><u> </u></em><em><u>that</u></em><em><u> </u></em><em><u>number</u></em><em><u> </u></em><em><u>itself</u></em><em><u>.</u></em>
<em>E.g</em><em>.</em>

and

Answer:
see explanation
Step-by-step explanation:
To find the roots factor the left side
x³ + 7x² + 12x = 0 ← factor out x from each term
x(x² + 7x + 12) = 0
x(x + 3)(x + 4) = 0
Equate each factor to zero and solve for x
x = 0
x + 3 = 0 ⇒ x = - 3
x + 4 = 0 ⇒ x = - 4
Roots are x = - 4, x = - 3, x = 0
If the slope if is undefined, then the line is vertical.
The equation of a vertical line: x = a (a - any real number).
The line passes through the point (-3, 0) → x = -3 and y = 0.
Therefore we have x = -3.
The general form of a line: Ax + By + C = 0.
x = -3 <em>add 3 to both sides</em>
<h3>x + 3 = 0</h3>
If you had
ax^2+bx+c
a is the leading term
when a>0, the parabola opens up and therfor has a minimum point and no max since it goes up infinitely
when a<0, the parabola opens down and therefor has a maximum point and not min since it goes down infinitely
-x^2+8x+9
-1<0
opens down
has max
vertex=max