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Mathematics 10 Online
OpenStudy (anonymous):

i need some algebra help with something please help?

OpenStudy (anonymous):

\[2\sqrt{7x}+\sqrt{7x}-3\sqrt{7x}-7\]

OpenStudy (saifoo.khan):

Add like terms.

OpenStudy (saifoo.khan):

OpenStudy (anonymous):

I have four answer choices 1. -7 2. \[\sqrt{7x}\] 3.\[3\sqrt{7x}-7\] 4.\[4\sqrt{7x}-7\]

OpenStudy (anonymous):

\[\sqrt{7x}(2 + 1 - 3) -7\] and then \[\sqrt{7x} \times 0 -7\] So the answer is -7

OpenStudy (anonymous):

what about \[5\sqrt{2}+\sqrt{2}\]How do i simplify that

OpenStudy (saifoo.khan):

(5+1) sqrt 2

OpenStudy (anonymous):

but sqrt 2 is there twice how did you get (5+1)sqrt of 2.

OpenStudy (saifoo.khan):

How will you solve:\[5x + x\]?

OpenStudy (anonymous):

\[5\sqrt{2} + \sqrt{2}\] then \[\sqrt{2}(5 + 1)\] so \[6\sqrt{2}\]

OpenStudy (anonymous):

what if i have \[\sqrt{16y^3}-\sqrt{y^3}\]

OpenStudy (anonymous):

\[\sqrt{y^3}(4-1)\]\[3\sqrt{y^3}\]

OpenStudy (precal):

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