4. Simplify: 8V45 - 8 V20 + V245 - 3V125
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Answer:
8√45 - 8√20 + √245 - 3√125
= 8×√ 3×3×5 - 8 × √4×5 + 3 × √5×5×5
= 8×3×√5 - 8×2×√5 + 3×5×√5
= 24×√5 - 16×√5 + 15×√5
= 8√5 + 15√5
= 23√5.
Hope this helps!! Can u please mark this is the brainliest answer? I'll be very thankful!
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