Question

solve this number.. argent ..​

Answer 1

1) (4-√13)(4+√13)

= 4²-(√13)²

= 16 - 13

= 3 .

2) (2√7-3√5)(6√5+5√7)

= 12√35+70-90-15√35

= -(20+3√35)

3) (7√6+3√2)(4√2-3√6)

= 28√12-126+24-9√12

= 19√12-102 .

4) 7√3(5√2+4√3)

= 35√6+84 .

5) 17√2(5+4√12)

= 85√2+68√24 .

Hope it's helpful to you.

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