How do you simplify 4 x 3?

How do you simplify 4 x 3?

Answer: Using the distributive property, 4(x+3) can be simplified as 4x +12.

What are the steps for solving a quadratic equation?

There are four steps in solving quadratic equations by this method: Step 1: Isolate the and terms. Use the addition and subtraction and isolate the and terms on the left-hand side of the equation. Then, use the multiplication and division axioms to eliminate the coefficient from the term.

How to solve 3×3 matrices?

Write your 3 x 3 matrix. We’ll start with a 3 x 3 matrix A,and try to find its determinant|A|.

Choose a single row or column. This will be your reference row or column. You’ll get the same answer no matter which one you choose.

Cross out the row and column of your first element. Look at the row or column you circled and select the first element.

Find the determinant of the 2 x 2 matrix. You may have learned this by drawing an X across the 2 x 2 matrix.

Multiply the answer by your chosen element. Remember,you selected an element from your reference row (or column) when you decided which row and column to cross out.

Determine the sign of your answer. Next,you’ll multiply your answer either by 1 or by -1 to get the cofactor of your chosen element.

Repeat this process for the second element in your reference row or column. Return to the original 3×3 matrix,with the row or column you circled earlier.

Repeat with the third element. You have one more cofactor to find. Calculate i for the third term in your reference row or column.

Add your three results together. This is the final step. You’ve calculated three cofactors,one for each element in a single row or column.

How do you solve linear equations by substitution?

The method of solving “by substitution” works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, “substituting” for the chosen variable and solving for the other. Then you back-solve for the first variable.

How do you solve the matrix equation?

Multiply both sides of the matrix equation by the inverse matrix. In order to multiply the matrices on the right side of the equation, the inverse matrix must appear in front of the answer matrix.(the number of columns in the first matrix must equal the number of rows in the second matrix). Complete the multiplication.