What are the exact solutions of x2 − 5x − 7 = 0, where x equals negative b plus or minus the square root of b squared minus 4 times a times c all over 2 times a

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Step-by-step explanation:

Given

Required

Solve for x using:

First, we need to identify a, b and c

The general form of a quadratic equation is:

So, by comparison with

Substitute these values of a, b and c in

Split the expression to two

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To solve further in decimal form, we have

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he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

location: point 0

step-by-step explanation:

well, -8 to 10 on a number line is 18 spaces.

1/9 of 18 is 2.

so, 4/9 of 18 must be 8.

8 spaces from -8 (a) is 0.

so, 4/9 of the way from -8 to 10 is 0!