Question

please solve this question at fast

Answer 1

, I hope this may help you

Answer 2

${a}^{4} - {(b + c)}^{4}$

Using the formula a² + b² = ( a + b ) ( a - b )

We get,

{ a²+ ( b + c )²}{ a²- ( b + c )²}

Again using the same formula,

= (a²+ b²+ 2bc + c² )[{a- ( b + c)}{ a + ( b + c )}]

Removing parentheses we get,

( a²+ b²+ 2bc + c² )( a + b + c )( a - b - c )

That's it
Hope it helped (≧▽≦)