What is the minimum modification to the equation (7l - l)*(7l + l) = 7l that makes it accurate?

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2006-11-02 03:17:33 · 3 answers · asked by Scott R 6 in Science & Mathematics ➔ Mathematics

Would it be possible after adding just one penstroke?

2006-11-02 03:30:46 · update #1

And keep it an equality please, no adding a line through the equals sign!!

2006-11-02 03:33:46 · update #2

One penstroke is sufficient.

2006-11-02 03:43:11 · update #3

(71-1)*(71+1)=7!

I like the question!

2006-11-06 18:00:30 · answer #1 · answered by bag o' hot air 2 · 0⤊ 0⤋

Possibly adding 1 and dividing it by 71? So that your equation now reads, [(71-1)(71+1)+1] / 71 = 71.

2006-11-02 11:30:03 · answer #2 · answered by just.ride 1 · 0⤊ 1⤋

Given: (7l - l)*(7l + l) = 7l
Change it to:
(7l - l)*(7l + l) = (7l)Â² - 1

(or)

(7l - l)*(7l + l) = 5040

2006-11-02 11:26:43 · answer #3 · answered by Brenmore 5 · 0⤊ 1⤋