Multiplying Binomials using the Grid Method

Multiplying Binomials using the Grid Method

Multiplying Binomials using the Grid Method Feb. 2007 S. Calahan The problem: (x + 3)(x + 2)

Set up the first expression on the top of the grid. x+ 3 Step 2: Place the second expression on the side.

x + 3 x + 2 Multiply by the top x

x + 3 x + 2 (x)(x) 2x

Multiply by 3 x + 3 x x2 3x + 2x 6 2

Add like terms Our answer would look like this x2 + 2x + 3x +6 = x2 + 5x + 6 Try another one.

(x 4)(x + 4) X - 4 X + 4 Multiply by the top x

X - 4 X x2 + 4x 4 Multiply by -4 X - 4

X x2 -4x + 4x -16 4 Write the answer X2 +4x -4x -16 X2 - 16

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