Question

$mention \: all \: the \: formulas \ \\ required \: for \: class \: 8 \: and \: write \: it \\ with \: clear \: explanation$
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of Algebra

Answer 1

Bro I am in class 11 now.

I have forgotten some but the important ones are as follows.

1. (a + b)² = a² + b² + 2ab
2. (a - b)² = a² + b² - 2ab
3. (a + b) (a - b) = a² - b²

Bro algebra is very easy. If you forget the formula then expand the equation and then formula is in your hands. :)

Example

(a + b)²

= (a + b) (a + b)

= a(a + b) + b( a + b)

= a² + ab + b² + ab

= a² + b² + 2ab

Bro maths is the easiest subject. You don't have to take tension all you need is to practice everyday. :)

Your brother. ❤️

Answer 2

Answer:

• a2 – b2 = (a – b)(a + b)
• (a + b)2 = a2 + 2ab + b2
• a2 + b2 = (a + b)2 – 2ab.
• (a – b)2 = a2 – 2ab + b2
• (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca.
• (a – b – c)2 = a2 + b2 + c2 – 2ab + 2bc – 2ca.
• (a + b)3 = a3 + 3a2b + 3ab2 + b3 ; (a + b)3 = a3 + b3 + 3ab(a + b)

HOPE IT HELP