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Verified answer
Mapel : MatematikaKelas : IX SMP
Bab : Akar pangkat
Pembahasan :
2√63 + 6√28
= 2√[9.7] + 6√[7.4]
= 2.3√7 + 6.2√7
= 6√7 + 12√7
= (6 + 12)√7
= 18√7
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5√7 - 2√11 + √7 - 8√11
= (5 + 1)√7 + (-2 - 8)√11
= 6√7 - 10√11
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7√3 + 6√5 + 2√48 - 4√20
= 7√3 + 6√5 + 2√[16.3] - 4√[5.4]
= 7√3 + 6√5 + 8√3 - 8√5
= 15√3 - 2√5