Question

помогите пожалуйста!!!!!;
$(4 - sqrt{3} )(4 + sqrt{3} )$
$( sqrt{2} + sqrt{3} )( sqrt{2} - sqrt{3)}$
$( sqrt{10} + sqrt{11} )( sqrt{11} - sqrt{10} )$

Answer 1

$(4 - sqrt{3} )( 4 + sqrt{3} ) = 16 - 3 = 13\ (sqrt{2} + sqrt{3} )( sqrt{2} - sqrt{3)} = 2 - 3 = -1$
(√11-√10)(√11+√10)=11-10=1

Answer 2

$(4 - sqrt{3} )(4 + sqrt{3} ) = {4}^{2} - sqrt{ {3}^{2} } = {4}^{2} - 3 = 16 - 3 = 13. \ ( sqrt{2} + sqrt{3} )( sqrt{2} - sqrt{3)} = sqrt{ {2}^{2} } - sqrt{ {3}^{2} } = 2 - 3 = - 1. \ ( sqrt{10} + sqrt{11} )( sqrt{11} - sqrt{10} ) = sqrt{ {11}^{2} } - sqrt{ {10}^{2} } = 11 - 10 = 1.$