ICSE Class 9 - Expansions Using Square Identities Videos

• x2-49
• (x-y-1)
• (2X+3y+5)(2x+3y-5)
  
• if X+1÷x =6 find x-1/x ,x²-1/x²
• if a^2+b^2+c^2=20 and a+b+c=0 find ab+bc+ca  
• Q16. 4a² - 12a + 9 - 49b²
• if X+y–z=4 and x²+y²+z²=30, then find value of xy–yz–zx.
• how can we solve 8 sum
  
• a+b=10 and a-b=2 find a^2 + b^2
• If x–1/x =3/2 ,then find x²–1/x²

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