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3 years ago

How to solve this questions

Mathematics

1 answer:

snow_lady [41]3 years ago

7 0

Answer:

11. C 3 < x < 4

Step-by-step explanation:

0 is not a positive or negative number, thus the answer should be C

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What's the answer? help asap plssssss Please show full explanation!

AURORKA [14]

Answer:

$\huge\boxed{Answer\hookleftarrow}$

Given,

$3x - 2y = 5$

$xy = - 2$

Now,

$(3x - 2y) {}^{2} = (5) {}^{2} \\$

Use the algebraic identity ⇻ (a - b)² = a² - 2ab + b²

$(3x - 2y) {}^{2} = (5) {}^{2} \\ 3x {}^{2} - 2 \times 3x \times 2y + 2y {}^{2} = 5 {}^{2} \\ 9 {x}^{2} - 12xy + 4y {}^{2} = 25 \\9x {}^{2} + 4y {}^{2} = 25 + 12xy \\ 9x {}^{2} + 4 {y}^{2} - 1 = 24 + 12xy$

✐ So, the value of 9x² + 4y² - 1 is 24 + 12xy

Now,

xy = - 2

So, 12xy = 12 × - 2 = - 24

•°• 24 + 12xy

= 24 + (-24)

= 24 - 24

= 0

<h3>⎆ The value of 9x² + 4y² - 1 is 0.</h3>

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

# ꧁❣ RainbowSalt2²2² ࿐

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3 years ago

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Factor x3 + x2 + x + 1 by grouping. What is the resulting expression?

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hope helped

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In the xy-plane, if line k has negative slope and passes through the point (−5,r), is the x-intercept of line k positive?

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We Need more info please us at brainly would like you to provide more information so we can answer your question right away thank you have a goodnight.

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