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3 years ago

10

If x=64, what is the value of x(x-8)?

2 answers:

RUDIKE [14]3 years ago

6 0

Answer:

$x = 64 \\ \\ x(x - 8) \\ = 64(64 - 8) \\ = 64 - 56 \\ = 8$

Hope it helps!

tekilochka [14]3 years ago

4 0

$\sf \: x = 64 \\ \\ \sf Substitute \: 64 \: in \: the \: place \: in \: 'x'\\ \\ \sf \: x(x -8) \\ \sf \: = 64(64 - 8) \\ \sf \: = 64 \times (56) \\ \sf = 64 \times 56 \\ = \boxed{ \bf 3584}$

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frutty [35]

Answer:

FIRST EXPRESSION:

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- If $b=-2$ , the value of $4b(b+1)$ is $8$

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SECOND EXPRESSION:

- If $b=-3$ , the value of $(2b+7)(2b-8))$ is $-14$

- If $b=-2$ , the value of $(2b+7)(2b-8))$ is $-36$

- If $b=10$ , the value of $(2b+7)(2b-8))$ is $324$

Yes, for any value of "b" the value of the first expression is greater than the value of the second expression.

Step-by-step explanation:

Substitute the given values of "b" into each expression and evaluate.

- For the first expression $4b(b+1)$ , you get:

If $b=-3$ → $4(-3)(-3+1)=24$

If $b=-2$ → $4(-2)(-2+1)=8$

If $b=10$ → $4(10)(10+1)=440$

- For the second expression $(2b+7)(2b-8))$ , you get:

If $b=-3$ → $(2(-3)+7)(2(-3)-8)=-14$

If $b=-2$ → $(2(-2)+7)(2(-2)-8)=-36$

If $b=10$ → $(2(10)+7)(2(10)-8)=324$

You can observe that for any value of "b" the value of the first expression is greater than the value of the second expression.

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