Mathematics: What is (x+5)(x-4)=0 Expand and solve for x

you should add the points so we know what to choose from. but to figure out the answer, graph it. then any points the are on the line are solutions....

What is (x+5)(x-4)=0 Expand and solve for x

Ответ:

vcasela

01.02.2022

Mathematics

A) $\huge\boxed{\sf x^2 + x - 20 = 0}$

B) $\huge\boxed{\sf x = - 5 \ \ \ \ OR \ \ \ \ x = 4}$

Step-by-step explanation:

$\sf (x+5)(x-4) = 0$

$\rule[225]{225}{2}$

Expanding:

Expanding Brackets

$\sf x^2 -4x+5x-20 = 0$

Adding / Subtracting Like terms

$\sf x^2 + x - 20 = 0$

$\rule[225]{225}{2}$

Solving:

Given the equation:

(x+5)(x-4) = 0

Using zero Method

Either,

x + 5 = 0 OR x - 4 = 0

x = - 5 OR x = 4

$\rule[225]{225}{2}$

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What is (x+5)(x-4)=0 Expand and solve for x

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