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Gennadij [26K]
2 years ago
9

Solve for x in x²+8x+15=0 in factorisation method ​

Mathematics
1 answer:
Genrish500 [490]2 years ago
7 0

Answer: x=-5, -3

Step-by-step explanation:

x^2 +8x+15=0\\\\(x+5)(x+3)=0\\\\x=-5, -3

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3 years ago
A step function h(x) is represented by y = -2Lx] Which phrase best describes the range of the function h(x)?
Pani-rosa [81]

The phrase best describes the range of the function h(x) is option A: all real numbers.

<h3>What is a range of a function?</h3>

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2 years ago
NEED HELP ASAP<br><br> Solve the system of equations: <br> Y=3x+5<br> Y=-2x+20
GenaCL600 [577]

Answer:

21

Step-by-step explanation:

because

4 0
2 years ago
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X divided by x minus 2 greater than or equal to zero
Tema [17]
X/x-2 >= 0 equals x/x >= 0+2 simplified x >=2
8 0
3 years ago
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(3x+1)(x-2)+ax+b=3x^2+8x-5<br> Work out the values of a and b
Musya8 [376]

Answer:

a = 13, b = - 3

Step-by-step explanation:

Expand the left side and compare like terms on both sides

(3x + 1)(x - 2) ← expand using FOIL

= 3x² - 5x - 2

left side = 3x² - 5x - 2 + ax + b ← combine like terms

             = 3x² + x(a - 5) + b - 2

right side = 3x² + 8x - 5

For the 2 sides to be equal then

a - 5 = 8 ( add 5 to both sides )

a = 13

and

b - 2 = - 5 ( add 2 to both sides )

b = - 3

7 0
3 years ago
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