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2 years ago

I need help NOW !!!!!!!!

Mathematics

1 answer:

Montano1993 [528]2 years ago

3 0

Answer:

$x=1~ \text{and}~ x = -6~ \text{but}~ -6 ~\text{is extraneous.}$

Step by step explanation:

$2-x = 3-\sqrt{7-3x}\\\\\implies \sqrt{7-3x} = 3-2+x\\\\\implies \sqrt{7-3x} = 1+x\\\\\implies 7-3x = (1+x)^2\\\\\implies 7-3x=1+2x+x^2\\\\\implies x^2+3x+2x+1-7=0\\\\\implies x^2+5x -6 =0\\\\\implies x^2+ 6x-x -6=0\\\\\implies x(x+6)-(x+6)=0\\\\\implies (x-1)(x+6)=0\\\\\implies x =1~~, x = -6$

$x=-6~ \text{Doesn't satisfy the original equation, so it is an extraneous solution.}$

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3 years ago

URGENT: If θ is a second-quadrant angle and cosθ = -2/3, then tanθ = _____.

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Answer

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3 years ago

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