5x+3y+z write down the square
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→ (5x+3y+z)²
→ (5x+3y+z)(5x+3y+z)
→ 5x×5x+5x×3y+5x×z+3y×5x+3y×3y+3y×z+z×5x+z×3y+z×z
→ 25x²+30xy+10xz+9y²+6yz+z²
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Answer:
Step-by-step explanation:
(5x+3y+z)^2
=25x^2+ 9y^2+ z^2 + 2*5x*3y+ 2*3y*z+ 2*5x*z
=25x^2 + 9y^2 +z^2 +30xy +6yz +10xz
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