Question

all the maths formula used in class 8th

please

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Answer 1

Answer:

▪︎(a + b)2 = a2 + 2ab + b2

(a – b)2 = a2 – 2ab + b2

(a + b) (a – b) = a2 – b2

(x + a) (x + b) = x2 + (a + b)x + ab.

(x + a) (x – b) = x2 + (a – b)x – ab.

(x – a) (x + b) = x2 + (b – a)x – ab.

(x – a) (x – b) = x2 – (a + b)x + ab.

(a + b)3 = a3 + b3 + 3ab(a + b)

a0 = 1

a-m = 1/am

(am)n = amn

am / an = am-n

am x bm = (ab)m

am / bm = (a/b)m

(a/b)-m =(b/a)m

(1)n= 1 for infinite values of n.

Discount = Marked Price – Sale Price

Discount = Discount % of the Marked Price

CP = Buying Price + Overhead Expenses

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Answer 2

Answer:

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