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9.

solve |4x + 3| = 9 + 2x and check for extraneous solutions.

the first answer I got was:
|4x +3| = 9 + 2x
|4x| = 6 + 2x
2x = 6
x = 3

can someone help me find the other answer? thank you!

1 answer

hello emily,remember the properties of modulus

|4x + 3| = 9 + 2x
case1 4x+3=9+2x =>x=3
case2 -4x-3=9+2x =>x= -2
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