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√50 + √2 - 2√50 + 4√200
= √25 × 2 + √2 - 2√25 × 2 + 4√25 × 8
= √5² × 2 + √2 - 2√5² × 2 + 4√5² × 8
= 5√2 + √2 - 10√2 + 20√4 × 2
= 5√2 + √2 - 10√2 + 20√2² × 2
= 5√2 + √2 - 10√2 + 40√2
= 6√2 - 10√2 + 40√2
= -4√2 + 40√2
= 36√2
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SOAL (9/10)
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√50 + √2 - 2√50 + 4√200
= √25 × 2 + √2 - 2√25 × 2 + 4√25 × 8
= √5² × 2 + √2 - 2√5² × 2 + 4√5² × 8
= 5√2 + √2 - 10√2 + 20√4 × 2
= 5√2 + √2 - 10√2 + 20√2² × 2
= 5√2 + √2 - 10√2 + 40√2
= 6√2 - 10√2 + 40√2
= -4√2 + 40√2
= 36√2
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