Two squares difference identities: LEVEL:NORMAL

☺ To put it verbally: the difference of the squares of two numbers is equal to the difference of these numbers times their sum.

X² - Y² = ( X + Y ) . ( X - Y)

EXECİSE: x² - y²=30 x + y = 6 IF X - Y = ? What are the consequence x² - y² = (x + y) . (x - y) 30 = 6 . (x - y) 30 = 6 . 5 ( x - y ) = 5

☺I made such a statement because most of you probably understood, but as I said before, you may have forgotten☺

Easy Math Editor

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

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Math	Appears as
Remember to wrap math in `$` ... `$` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$

Comments

A little tip for better formatting ;)

use backslash, opening bracket to begin a formatted equation and backslash, closing bracket to end an equation. Inside the brackets you can put Latex-code. Learning Latex is always good for the future life (especially when you like math)

for example "X^2-Y^2=\left(X+Y\right) \cdot \left(X-Y\right)" will look like $X^2-Y^2=\left(X+Y\right) \cdot \left(X-Y\right)$

use "\cdot" as multiplication sign otherwise you cannot distinguish between multiplication and decimal points.

for example "5 \cdot 3" will look like $5 \cdot 3$ while "5 . 3" will look like $5 . 3$

And don't worry, there are programs out there that can convert equations into Latex-code.

CodeCrafter 1 - 5 months, 1 week ago

very thnx =)

Ömer Ertürk - 5 months, 1 week ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$