How do you multiply $(x-1.4)(x+1)$ ?

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Answer 1 · 2017-10-02T21:51:20

Just like the case where both constants are integers...

...multiply every term in the first set of parenthtesis with every term in the second, then add everything togeter, collecing terms:

$x^2 +x - 1.4x -1.4 = x^2 -0.4x -1.4$

GOOD LUCK!

How do you multiply (x-1.4)(x+1)(x-1.4)(x+1)?