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Foiling

Foiling. Overview on multiplying binomials by foiling. First Look at the problem. (2+3) (4-2) Remember the rules for multiplying negatives. Multiplying a positive and negative = negative Multiplying a negative and negative= positive Multiplying a positive and positive = positive. Foiling.

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Foiling

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  1. Foiling Overview on multiplying binomials by foiling

  2. First Look at the problem • (2+3) (4-2) • Remember the rules for multiplying negatives. • Multiplying a positive and negative = negative • Multiplying a negative and negative= positive • Multiplying a positive and positive = positive

  3. Foiling • F: First = multiply the two beginning numbers in each parenthesis with each other. • O: Outer = multiply the first number in the first set of parenthesis with the last number in the last set. The outer numbers. • I: Inner = Multiply the second number in the first set on parenthesis with the first number in the second set. The inner numbers. • L: Last = Multiply the last numbers in both sets of parenthesis with each other.

  4. F: First • (2+3) (4-2) • Multiply the first 2 numbers so 2x4=8.

  5. O: Outer • (2+3) (4-2) • Multiply the two outer numbers • 2x-2=-4 • So far we have 8-4

  6. I: inner • (2+3) (4-2) • Multiply the two inner numbers 3x4=12 • Since this is a positive 12, we put it in as a +12. • So far we have 8-4+12

  7. L: Last • (2+3) (4-2) • Multiply the two last numbers together 3x-2=-6 • So to finish our answer it would be: 8-4+12-6 • Then answer straight across and you should get: 10

  8. By: Mrs. Thompson

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