how would u solve this? please help
ln (x - 2) + ln (x - 5) = ln (x+ 3)
How do you solve this and what answer do you get?
Thanks
ln (x - 2) + ln (x - 5) = ln (x+ 3)
How do you solve this and what answer do you get?
Thanks
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First simplify the left side of the equation using the rule that ln(a) + ln(b) = ln(ab)
ln[(x-2)(x-5)] = ln(x+3)
Next, since both sides are to the ln, you can cancel it by doing e to the ln of that side using the rule e^l[n(x)] = x
e^[ln[(x-2)(x-5)]] = e^[ln(x+3)]
(x-2)(x-5) = (x+3)
And finally, simplify and solve for x!
x^2-7x+10 = x+3
x^2-8x+7 = 0
(x-7)(x-1) = 0
FINAL ANSWER: x = 7, 1
ln[(x-2)(x-5)] = ln(x+3)
Next, since both sides are to the ln, you can cancel it by doing e to the ln of that side using the rule e^l[n(x)] = x
e^[ln[(x-2)(x-5)]] = e^[ln(x+3)]
(x-2)(x-5) = (x+3)
And finally, simplify and solve for x!
x^2-7x+10 = x+3
x^2-8x+7 = 0
(x-7)(x-1) = 0
FINAL ANSWER: x = 7, 1
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ln((x-2)(x-5))=ln(x+3)
x^2-7x+10=x+3
x^2-8x-7=0 roots of this are : 7 and 1
x^2-7x+10=x+3
x^2-8x-7=0 roots of this are : 7 and 1