alwyfeby(√12 + √8 )(√18 - √27) = (√12 x √18)(√12 x -√27)(√8 x √18)(√8 x -√27) = {(√4 x 3 ) x (√9 x 2 )} {(√4 x 3 ) x -(√9 x 3 )} {(√4 x 2 ) x (√9 x 2 )} {(√4 x 2 ) x -(√9 x 3 )} = (2√3 x 3√2) (2√3 x -3√3) (2√2 x 3√2) (2√2 x -3√3) = 6√6 - 6√9 + 6√4 - 6√6 = 6√6 (-6.3) + (6.2) - 6√6 = 6√6 - 6√6 - 18 + 12 = 6 semoga bermanfaat :)
= √216 - √324 + √144 - √216
= -√324 + √144
= - √81.4 + 12
= -9√4 + 12 atau 12-9√4
= (√12 x √18)(√12 x -√27)(√8 x √18)(√8 x -√27)
= {(√4 x 3 ) x (√9 x 2 )} {(√4 x 3 ) x -(√9 x 3 )} {(√4 x 2 ) x (√9 x 2 )} {(√4 x 2 ) x -(√9 x 3 )}
= (2√3 x 3√2) (2√3 x -3√3) (2√2 x 3√2) (2√2 x -3√3)
= 6√6 - 6√9 + 6√4 - 6√6
= 6√6 (-6.3) + (6.2) - 6√6
= 6√6 - 6√6 - 18 + 12
= 6
semoga bermanfaat :)