Problem

Clear my choice If $-2 x^{3}-6 x^{2}+5 x-7$ is divided by $x-7$ to give a quotient of $-2 x^{2}$ and a remainder of -952 , then which of the following is true? Select one: a. $(x-7)\left(-2 x^{2}-20 x-135\right)=-952$ b. $-2 x^{3}-6 x^{2}+5 x-7=(x-7)\left(-2 x^{2}-20 x-135\right)+952$ C. $(x-7)\left(-2 x^{2}-20 x-135\right)=952$ d. $-2 x^{3}-6 x^{2}+5 x-7=(x-7)\left(-2 x^{2}-20 x-135\right)-952$ Glear my choice

Solution

Step 1 :Given that the polynomial $-2x^3 - 6x^2 + 5x - 7$ is divided by $x-7$ to give a quotient of $-2x^2$ and a remainder of -952.

Step 2 :Using the division formula: Dividend = (Divisor * Quotient) + Remainder

Step 3 :Substitute the given values: $-2x^3 - 6x^2 + 5x - 7 = (x-7)(-2x^2) + (-952)$

Step 4 :Comparing the given options, we find that option d matches the equation: $-2 x^{3}-6 x^{2}+5 x-7=(x-7)left(-2 x^{2}-20 x-135 ight)-952$

Step 5 :\(\boxed{\text{d. }-2 x^{3}-6 x^{2}+5 x-7=(x-7)left(-2 x^{2}-20 x-135 ight)-952}\)

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Source: https://solvelyapp.com/problems/15549/

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