(7x3 + 7x2 – 4) + (x3 – 5x2 – 3x + 8)

Mathematics

1 answer:

aksik [14]3 years ago

8 0

Answer:

it's not clear what do you want to with this? it's not even an equation explain your problem so we can solve it

Explain step by step:

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Which expression is the factored form of x2 – 7x + 10? (x + 3)(x + 4) (x – 3)(x – 4) (x – 2)(x – 5) (x + 2)(x + 5)

vivado [14]

(x-2)(x-5) because -5x-2=10 and -5+-2=-7

6 0

3 years ago

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Solve for x. Sqrt8 (Sqrt2 - x) = 11

Alexus [3.1K]

Answer: $\frac{-7\sqrt{2} }{4}$

Step-by-step explanation:

So first, let's get rid of the parentheses. We can multiply it out to get $\sqrt{16}-x\sqrt{8} =11$ . We know that the square root of 16 is ±4, so now our equation is ±4 - $x\sqrt{8}$ =11. I'm guessing since the problem only has one solution it's most likely only positive 4, so let's revise our equation to 4 - $x\sqrt{8}$ =11. We can use inverse operations to make the a little easier to solve: -7= $x\sqrt{8}$ . We divide both sides by $\sqrt{8}$ to get $\frac{-7}{\sqrt{8} } =x$ , which we can rationalize (remove the square root from the denominator so that it's a proper answer) by multiplying by $\frac{\sqrt{8} }{\sqrt{8} }$ (which is equal to one so we can use it) which is equal to $\frac{-7\sqrt{8} }{8}$ . Let's finish this by simplifying it. $\sqrt{8} =2\sqrt{2}$ (2x $2^{2}$ ). We can simplify it further by simplifying the 2, making it $\frac{-7\sqrt{2} }{4}$ .