Multiply the following binomials using the FOIL method. Show your solution on your sheet.
1. (3a+7)(a−3)
2. (5x−1)(2x−5)
3. (m+2n)(m+n)
4. (4m−9)(2m+1)
1. (3a+7)(a−3)
2. (5x−1)(2x−5)
3. (m+2n)(m+n)
4. (4m−9)(2m+1)
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1. (3a+7)(a−3)
= 3a² + 9a - 7a - 21
= 3a² + 2a - 21
2. (5x−1)(2x−5)
= 10x² - 25x + 2x + 5
= 10x² - 27x + 5
3. (m+2n)(m+n)
= m² + mn - 2nm + 2n²
= m² + 3mn + 2n²
4. (4m−9)(2m+1)
= 8m² - 4m - 18m - 9
= 8m² - 14m² - 9
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