To decompose the polynomial \((x^2−7x+6)(x^2+3x−18)\) into linear factors, we first need to factor each quadratic polynomial separately.
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Factoring \(x^2 - 7x + 6\): This can be factored by finding two numbers that multiply to \(6\) (the constant term) and add to \(-7\) (the coefficient of \(x\)). The numbers are \(-1\) and \(-6\): \[ x^2 - 7x + 6 = (x - 1)(x - 6) \]
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Factoring \(x^2 + 3x - 18\): We need to find two numbers that multiply to \(-18\) and add to \(3\). The numbers are \(6\) and \(-3\): \[ x^2 + 3x - 18 = (x + 6)(x - 3) \]
Now we can substitute the factored forms back into the expression: \[ (x^2 - 7x + 6)(x^2 + 3x - 18) = (x - 1)(x - 6)(x + 6)(x - 3) \]
Thus, the complete factorization of the given polynomial into linear factors is: \[ (x - 1)(x - 6)(x + 6)(x - 3) \]