Solve (2x+3)(-5-x): Binomial Expression Multiplication

Solve the following equation:

(2x+3)(5x)= (2x+3)(-5-x)=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solution
00:03 Open brackets properly, multiply each factor by each factor
00:28 Let's calculate the multiplications
01:00 Positive times negative always equals negative
01:13 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

Solve the following equation:

(2x+3)(5x)= (2x+3)(-5-x)=

2

Step-by-step solution

We will use the extended distribution law as seen below in order to simplify the given expression:

(a+b)(c+d)=ac+ad+bc+bd (a+b)(c+d)=ac+ad+bc+bd

We will begin by performing the multiplication between the pairs of parentheses, using the mentioned distribution law. Then we will proceed to combine like terms if possible. We'll do this whilst taking into account the correct multiplication of signs:

(2x+3)(5x)=10x2x2153x=2x213x15 (2x+3)(-5-x)= \\ -10x-2x^2-15-3x=\\ \boxed{-2x^2-13x-15}

Therefore, the correct answer is answer D.

3

Final Answer

2x213x15 -2x^2-13x-15

Practice Quiz

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\( (3+20)\times(12+4)= \)

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