In November 2024
Answer to Question #132564 in Geometry for Charlie
PQ = 6x + 25 and QR = 16 – 3x; Find PR.
"PR=\\sqrt{(6x+25)\u00b2+(16-3x)\u00b2-2(6x+25)(16-3x)cos(\\angle PQR)}=\\sqrt{36x\u00b2+300x+625+256-96x+9x\u00b2-2(96x-18x\u00b2+400-75x)cos(\\angle PQR)}=\\sqrt{45x\u00b2+204x+881-2(21x-18x\u00b2+400)cos(\\angle PQR)}.\nAnswer: PR=\\sqrt{45x\u00b2+204x+881+2cos(\\angle PQR)(18x\u00b2-21x-400)}"
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