Question

plz give me class 9 all formulas



negative answer is reported

Answer 1

here is your all 9 formula

Answer 2

Answer:

Step-by-step explanation:

POLYNOMIALS

(x+y)²=x²+y²+2xy

(x-y)²=x²+y²-2xy

(x+y+z)²=x²+y²+z²+2xy²2yz²2zx

x²-y²=(x+y)(x-y)

(x+y)³=x³+y³+3xy(x+y)

(x-y)³=x³-y³-3xy(x-y)

x³+y³+z³-3xyz=(x+y+z)(x²+y²+z²-xy-yz-zx)

HERON'S FORMULA

area of triangle=1/2*base*height

area of triangle=√s(s-a)(s-b)(s-c)

SURFACE AREA AND VOLUME

surface area of cuboid=2(lb+bh+hl)

surface of cube=6a²

CSA of cylinder=2πrh

TSA of cylinder=2πr(r+h)

CSA of cone=πrl

TSA of cone=πr(l+r)

surface area of a sphere=4πr²

CSA of hemisphere=2πr²

TSA of hemisphere=3πr²

volume of cuboid=l*b*h

volume of cube=a³

volume of cylinder=πr²h

volume of cone=1/3πr²h

volume of hemisphere=2/3πr³

volume of sphere=4/3πr³

STATISTICS

mean=sum of all observation/total no. of observation

median

if the observation is odd, median=[(n+1)/2]

if the observation is even, median=(n/2)and[(n+1)/2]

PROBABILITY

P(E)=no. of trials in which the event happened/the total no. of trials

HOPE IT HELPS

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