Which expression can be used to find the sum of the polynomials? (9–3x2) + (+8x2 + 4x + 5) [(-3x2)+(-8x2)] +4x+[+(-5)] [3x2 +8x2] +4x+[9+(-5)] - [3x2+(-8x2}}+4x+[9+5] • [[-342) + (-8x2)] +4x+[9+5]

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

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step-by-step explanation:

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