Simplify. (a + b+ c ) (a + b - c) please tell me how to slove this..!!
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( a + b + c ) x ( a + b - c )
For solve this, first of all, all letter of bracket 1 multiply by all letter of bracket 2.
SO,
a × a + a × b + a × (-c) + b × a + b × b + b × (-c) + c × a + c × b + c × (-c)
= a² + ab - ac + ba + b² - bc + ca + cb - c²
short letter are always write on first,
= a² + ab - ac + ab + b² - bc + ac + bc - c²
= a² + ab + ab - ac + ac + b² - bc + bc -c²
then, same value of plus will add and same value of plus and minus both will subtract.
= a² + 2ab + b² - c²
so this is answer.
I HOPE IT HELPS. :-)
For solve this, first of all, all letter of bracket 1 multiply by all letter of bracket 2.
SO,
a × a + a × b + a × (-c) + b × a + b × b + b × (-c) + c × a + c × b + c × (-c)
= a² + ab - ac + ba + b² - bc + ca + cb - c²
short letter are always write on first,
= a² + ab - ac + ab + b² - bc + ac + bc - c²
= a² + ab + ab - ac + ac + b² - bc + bc -c²
then, same value of plus will add and same value of plus and minus both will subtract.
= a² + 2ab + b² - c²
so this is answer.
I HOPE IT HELPS. :-)
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