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Brut [27]
3 years ago
9

If x-2y=1 and 2x+3y=9 then what is x

Mathematics
1 answer:
yan [13]3 years ago
6 0
The first one is x=2y plus one.
The second one is

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Find the values of p and q such that 4x^2+12x=4(x+p)^2-q
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Answer:

p = 1.5 and q = 9

Step-by-step explanation:

Expand the right side then compare the coefficients of like terms on both sides, that is

4(x + p)² - q ← expand (x + p)² using FOIL

= 4(x² + 2px + p²) - q ← distribute parenthesis

= 4x² + 8px + 4p² - q

Comparing coefficients of like terms on both sides

8p = 12 ( coefficients of x- terms ) ← divide both sides by 8

p = 1.5

4p² - q = 0 ( constant terms ), that is

4(1.5)² - q = 0

9 - q = 0 ( subtract 9 from both sides )

- q = - 9 ( multiply both sides by - 1 )

q = 9

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