The area of a triangle is equal to ½ base x height:

a = ½bh
a = ½ x 3 x 1 = \( \frac{3}{2} \) = 1\(\frac{1}{2}\)

A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.

To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.

8a + 9z = -4a - 6z - 2
8a = -4a - 6z - 2 - 9z
8a + 4a = -6z - 2 - 9z
12a = -15z - 2
a = \( \frac{-15z - 2}{12} \)
a = \( \frac{-15z}{12} \) + \( \frac{-2}{12} \)
a = -1\(\frac{1}{4}\)z - \(\frac{1}{6}\)

The first step to solve a quadratic expression that's not set to zero is to solve the equation so that it is set to zero:

y² + 7y + 11 = y + 2
y² + 7y + 11 - 2 = y
y² + 7y - y + 9 = 0
y² + 6y + 9 = 0

Next, factor the quadratic equation:

y² + 6y + 9 = 0
(y + 3)(y + 3) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, (y + 3) must equal zero:

If (y + 3) = 0, y must equal -3

So the solution is that y = -3

To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

7a² - 8a² = -1a²