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3 years ago

What is the value of A and B (5x + b)(5x - b) = ax^2 - 49

Mathematics

1 answer:

Ostrovityanka [42]3 years ago

6 0

Answer:

a=25

b=7

Step-by-step explanation:

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DanielleElmas [232]

Answer:

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Step-by-step explanation:

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2 years ago

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2 years ago

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ABCD IS A TRAPEZIUM <br><br> WORK OUT THE SIZE OF ANGLE CDA.

zvonat [6]

Answer:

The measure of angle CDA is $27.6\°$

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

In the right triangle ABF

Applying Pythagoras Theorem

$A.F^{2}=6.5^{2}-6^{2}$

$A.F^{2}=6.25$

$A.F=2.5\ cm$

In the right triangle CED

$CE=6\ cm$

$ED=23-(9+2.5)=11.5\ cm$

$tan($

substitute the values

$tan($

$($

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2 years ago