Basic algebra formulas that you can revise anytime and anywhere

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FORMULAS FOR BEGINNER (a+b) ^2= a^2+b^2+2ab (a+b) ^2= (a-b) ^2+4ab (a-b) ^2= a^2+b^2-2ab (a-b) ^2= (a+b) ^2-4ab a^2+b^2= (a+b) ^2-2ab a^2+b^2= (a-b) ^2+ 2ab a^2-b^2= (a+b) (a-b) (a+b+c) ^2= a^2+b^2+c^2+2(ab+bc+ac) (a-b-c) ^2= a^2+b^2+c^2-2(ab-bc+ac) (a+b) ^3= a^3+b^3+3ab(a+b) (a-b) ^3= a^3-b^3+3ab(a-b) a^3+b^3= (a+b) (a^2-ab+b^2) a^3-b^3= (a-b) (a^2+ab+b^2) a^4-b^4= (a^2-b^2) (a^2+b^2) = (a^2+b^2) (a+b) (a-b) a^5+b^5= (a+b) (a^4-a^3b+a^2b^2-ab^3+b^4) a^5-b^5= (a-b) (a^4+a^3b+a^2b^2+ab^3+b^4)
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Salt & Pepper using MATLAB

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p=imread('BIRDS.jpg');
p=rgb2gray(p);

figure;
imshow(p);
impixelinfo;
q=imnoise(p,'salt & pepper',0.1);

h1=1/9*ones(3,3);
h2=1/25*ones(7,7);

c1=conv2(q,h1,'same');
c2=conv2(q,h2,'same');
c3=imfilter(p,h1);
c4=imfilter(p,h2);

subplot(2,2,1),imshow(p);title('Original Image');
subplot(2,2,2),imshow(q);title('Noise Effected Image');
subplot(2,2,3),imshow(c3);title('3 x 3 Filter');
subplot(2,2,4),imshow(c4);title('5 x 5 Filter');



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