Add 3r (p-q-r) and 2q( p+q-r)
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Answer:
3pr+2pq-5qr-3r^2+2q^2
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3r(p - q - r) + 2q(p + q - r)
= 3pr - 3qr - 3r^2 + 2qp + 2q^2 - 2qr
= 3pr - 5qr - 3r^2 + 2qp + 2q^2 —-> Answer
= 3pr - 3qr - 3r^2 + 2qp + 2q^2 - 2qr
= 3pr - 5qr - 3r^2 + 2qp + 2q^2 —-> Answer
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