please answr my question fassst
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Step-by-step explanation:
Lx⁴ + Mx³ + Nx² + Rx + P = 0
x = -1
L(-1)⁴ + M(-1)³ + N(-1)² + R(-1) + P = 0
L - M + N - R + P = 0
L + N + P = -(-M - R)
L + N + P = M + R
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