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3 years ago

PLEASE HELP ME (will mark brainliest

Mathematics

1 answer:

jonny [76]3 years ago

3 0

Answer:

The answers I got might not be right but:

47. Equation: (3x)-(7+5x)=25 x= -16

48. Equation: x÷(-3+6)=9 x=37

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2 years ago

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Imagine you are teaching a younger student how to factor. Describe in full sentences what you would say to teach the young stude

djyliett [7]

Answer:

$x^2+ 4x - 21$ =(x-3)(x+7)

Step-by-step explanation:

To factor the trimonial: $x^2+ 4x - 21$ , we follow these steps:

Step 1: Multiply the first and last term

$-21 \times x^2=-21x^2$

Step 2: List out product factors of the term derived above

$-21=-1 \times 21\\ -21=-3 \times 7\\-21=3 \times -7\\-21=1 \times -21$

Step 3: Determine which of the factors sum up to the middle term 4x

The required product is: -3 and 7

Therefore: -3x+7x=4x

Step 4: Replace the middle term by the expression derived in step 3 and factorize.

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2 years ago