Ask question

Ask question

All categories

2 years ago

11

Step by step plz 2x^2 + x - 3

1 answer:

Aleks04 [339]2 years ago

7 0

Answer:

x = 1 or x = -3/2

Step-by-step explanation:

Solve for x over the real numbers:

2 x^2 + x - 3 = 0

The left hand side factors into a product with two terms:

(x - 1) (2 x + 3) = 0

Split into two equations:

x - 1 = 0 or 2 x + 3 = 0

Add 1 to both sides:

x = 1 or 2 x + 3 = 0

Subtract 3 from both sides:

x = 1 or 2 x = -3

Divide both sides by 2:

Answer: x = 1 or x = -3/2

You might be interested in

What is the zero in the quadratic function f(x)= 9x^2-54x-19?

Alex17521 [72]

Answer:

6.33... and 0.333...

Step-by-step explanation:

The quadratic formula is

$x=\frac{-b+\sqrt{b^2-4ac} }{2a}$ .

It is important because while some quadratics are factorable and can be solved not all are. The formula will solve all quadratic equations and can also give both real and imaginary solutions. Using the formula will require less work than finding the factors if factorable. We will substitute a=9, b=-54 and c=-19.

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}\\x=\frac{-(-54)+/-\sqrt{(-54)^2-4(9)(-19)} }{2(9)}\\x=\frac{54+/-\sqrt{2916+684} }{18}$

We will now solve for the plus and the minus.

The plus,,,

$x=\frac{54+\sqrt{3600}}{18}\\x=\frac{54+60}{18}\\x=\frac{114}{18}\\x=6.3$

and the minus...

$x=\frac{54-\sqrt{3600}}{18}\\x=\frac{54-60}{18}\\x=\frac{-6}{18}\\x=-0.333...$

8 0

3 years ago

If x= -3, and -3 = y, then what can be said about the relationship between x and y? Explain

ella [17]

I'd say that the relationship between y and x is that they're both equivalent to each other, since -3 = -3.

7 0

2 years ago

Read 2 more answers

PLEASE HELP!! HURRY!! THIS IS WAYY PAST DUE!! DON'T ANSWER FOR POINTS!! I NEED HELP!!!

kolbaska11 [484]

Answer:

Based on your line, what is the likely test score of a student who does not study for the test? 45

7 0

2 years ago

Help please hurry i need done in 20 minutes

klemol [59]

Answer:

OKAY I WAS STRESSING FOR A QUICK MINUTE THINKING I WAS GETTING SOMETHING WRONG BUT THINK THE ANSWER IS CORRECT

So Cos0= 15/64 (SIMPLIFIED) or in decimal form 0.234375

Step-by-step explanation:

7/8² is 49/64 or (in decimal form) 0.765625

1 - 0.765625 = 0.234375

8 0

2 years ago

a recipe calls for cookies for 3 1/4 cups of. sugar.amy already puts in 3 1/9 cups.how many more cups does she nees t put in

prohojiy [21]

$3 \frac{1}{4}-3 \frac{1}{9} \\ \\ \frac{13}{4} - \frac{28}{9} \\ \\ \frac{117}{36} - \frac{112}{36} \\ \\ \frac{5}{36}$

5 0

3 years ago