Please help me , thank you

Hello BinibiningDel!

Factorise the polynomials.

Method used :-

Use the algebraic identity ⇨ a² + b² = (a + b) (a - b ).Here, a = x & b = 7.

Note :-

I think the question should actually be ⇨ x² - 49.

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Method used :-

Use the algebraic identity ⇨ a² + 2ab + b² = (a + b)².Here, a = a & b = 5.

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Method used :-

Use the splitting the middle term method to factorise this.

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Method used :-

Use the algebraic identity ⇨ a² + b² = (a + b) (a - b ).Here, a = 2x & b = y.

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Method used :-

Take the common factor out & factorise it.

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Method used :-

Use the splitting the middle term method to factorise this.

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Method used :-

Use the algebraic identity ⇨ a³ + b³ = (a + b) (a² - ab + b²).Here, a = y & b = 3.

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Method used :-

Take the common factor out & factorise it.

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Hope it'll help you!

ℓu¢αzz ッ

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )