Menyederhanakan akar menggunakan rumus√(a+b) ± 2√ab = √a ± √bMakaA. √5 +2√6 = √(3+2) +2√3.2= √3 + √2B.√10 - 2√21= √(7+3) - 2√7.3= √7 - √3C. √6 + 4√2= √6 + √(16X2)= √6 + √32= √6 + √4 X 8= √6 + 2√8= √(4+2) + 2√4.2= √4 + √2
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Menyederhanakan akar menggunakan rumus
√(a+b) ± 2√ab = √a ± √b
Maka
A. √5 +2√6
= √(3+2) +2√3.2
= √3 + √2
B.√10 - 2√21
= √(7+3) - 2√7.3
= √7 - √3
C. √6 + 4√2
= √6 + √(16X2)
= √6 + √32
= √6 + √4 X 8
= √6 + 2√8
= √(4+2) + 2√4.2
= √4 + √2