I need help solving. please help. show me step by step. THANKS(: (a-8)(a+5)
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We are going to FOIL...
INNER...(-8)(a)=-8a---note the negative sign as the equation involves subtraction.
LAST...(-8)(5)=-40---note the negative sign as the equation involves subtraction.
Let's combine like terms...
Note that the figure with the exponential, a2, comes first. The figure with the coefficient, -3a, is second. The constant, -40, is last. This is standard hierarchy.