Practice Set 5.1 1. Expand (1) (a +2)(a - 1) (4) (13 + x)(13 - x) (2) (m - 4)(m + 6) (3) (p + 8)(p-3) (5) (3x + 4y)(3x + 5y) (6) (9x – 5t)(9x + 3t) Ex. (4 (7)(-+) -- (8)(x++) (-) (9+4) 6- 3
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Step-by-step explanation:
1) (a +2)(a - 1)=a^2+a-2
2) (m - 4)(m + 6)=m^2+2m-24
3) (p + 8)(p-3)=p^2+5p-24
4) (13 + x)(13 - x)=169-x^2
5) (3x + 4y)(3x + 5y)=9x^2+20y^2+27xy
6) (9x – 5t)(9x + 3t)=81x^2-15t^2-18xt
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