How do you factor $4g ^ { 2} - 40g + 36$ ?

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Answer 1 · 2017-03-22T03:59:09

$(4g-36) (g-1)$

Find factors of $4$ that when cross multiplied to the factors of $36$ will equal to $-40$ .

For example,

$4" " -36$

$1" " -1$

When you cross multiply $-1$ and $4$ to get $-4$ . Then cross multiply $1$ and $-36$ to get $-36$ . Once you add them, you get $-40$ .

How do you factor 4g ^ { 2} - 40g + 364g ^ { 2} - 40g + 36?