Jawab:
5. √5+2) (√5-2)
= 5 - 2√5 + 2√5 - 4
= 1
no. 6
(√15-√12) (√15+√12)
15 + √300 - √300 - 12
= 3
n0. 7
(3√2 +2√3) (3√2-2√3)
9√4 - 6√6 + 6√6 - 4√9
= (9x2) -(4x3)
= 18 - 12
= 6
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Jawab:
5. √5+2) (√5-2)
= 5 - 2√5 + 2√5 - 4
= 1
no. 6
(√15-√12) (√15+√12)
15 + √300 - √300 - 12
= 3
n0. 7
(3√2 +2√3) (3√2-2√3)
9√4 - 6√6 + 6√6 - 4√9
= (9x2) -(4x3)
= 18 - 12
= 6