How do you factor #ab + 4 + a + 4b#?

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How do you factor #ab + 4 + a + 4b#?

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Answer 1 · 2018-03-16T11:14:36

Group it together
#ab+a+4+4b#
As you must have noticed by now..... it is the only way
#ab+a=a(b+1)#
#4+4b=4(b+1)#
Put them together
#a(b+1)+4(b+1)#
#(a+4)(b+1)#

Answer 2 · 2018-03-16T11:36:41

# (a+4)(b+1)#

Explanation:

#ab+4+a+4b#

#=> ab+a+4b+4#

#=> a(b+1)+4(b+1)#

#=> (a+4)(b+1)#

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How do you factor #ab + 4 + a + 4b#?

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