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charle [14.2K]
2 years ago
7

Three triangles are shown on the centimetre grid

Mathematics
1 answer:
TiliK225 [7]2 years ago
4 0

Answer:

Where is the full question??

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Solve by completing the square. Round your answers to the nearest tenth and then locate the greater solution. <img src="https://
Andrews [41]

Step-by-step explanation:

Step 1: Write our Givens

{x}^{2}  + 10x - 7 = 0

Move the constant term ,(the term with no variable) to the right side.

Here we have a negative 7, so we add 7 to both sides

{x}^{2}  + 10x = 7

Next, we take the linear coeffeicent and divide it by 2 then square it.

( \frac{10}{2} ) {}^{2}  = 25

Then we add that to both sides

{x}^{2}  + 10x + 25 = 7 + 25

{ {x}^{2} } + 10x + 25 = 32

Next, we factor the left,

(x + 5)(x + 5) = 32

we got 5 because 5 add to 10 and multiply to 25 as well.

so we get

(x + 5) {}^{2}  = 32

This is called a perfect square trinomial.

Next, we take the square root of both sides

x + 5 = ± \sqrt{32}

± menas that we have a positive and negative solution.

Subtract 5 form both side so we get

x =  - 5± \sqrt{32}

The greater solution is when sqr root of 32 is positive so the answer to that is

\sqrt{32}  - 5 = 0.7

3 0
2 years ago
What is the answer to -3(x+6)=​
Amanda [17]
-3x - 18 = 0
-3x = 18
x = -6
7 0
3 years ago
Factorize 9(a+1)^2-81​
Lunna [17]

Answer:9a^2+18a-72

Step-by-step explanation:

9(a+1)^2-81

9(a+1)(a+1)-81

Open brackets

9(a^2+a+a+1)-81

9(a^2+2a+1)-81

9a^2+18a+9-81

9a^2+18a-72

5 0
3 years ago
Cuanto costara una sala que se anuncia en $7500, con el 30% de descuento mas 16% de IVA
alexgriva [62]

Answer:

30 por ciento:2250

16 por ciento:1200

Step-by-step explanation:

4 0
3 years ago
How do the signs of factors affect their products
evablogger [386]

Answer:

If a negative number is multiplied with a positive number, it will be negative. If two positive numbers are multiplied, it will be positive. If two negative numbers are multiplied, it will also be positive.

Step-by-step explanation:

3 0
3 years ago
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