Penjelasan dengan langkah-langkah:
√ (a+b)-2√ab = √a - √b (dimana a>b)
maka :
√7-4√3 = √7 -2.2√3
= √7 -2√12
=√(4+3)-2√4.3
= √4 - √3
= 2 - √3
persamaan kuadrat
(x-2)(x+√3) = x^2 +(√3-2)x -2√3 =0
maka a+ b = √3 -2 -2√3
= -√3 -2
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Penjelasan dengan langkah-langkah:
√ (a+b)-2√ab = √a - √b (dimana a>b)
maka :
√7-4√3 = √7 -2.2√3
= √7 -2√12
=√(4+3)-2√4.3
= √4 - √3
= 2 - √3
persamaan kuadrat
(x-2)(x+√3) = x^2 +(√3-2)x -2√3 =0
maka a+ b = √3 -2 -2√3
= -√3 -2