evaluate 7 / 8 x + 4 / 5 y whole square×4/5
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= (7/8x + 4/5y)²
= (49/64x² + 16/25y² + 7/5xy) * 4/5
=196/320x² + 64/125y² + 28/25xy
Please add as BRAINLIEST if it is correct and sorry if it wrong.
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