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Polynomials

Short Answer Type

181. Expand the following:

(i) (x - 2y - 3z)² (ii)

open parentheses y minus square root of 3 close parentheses squared

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182. Factorise the following using appropriate identities:

9x² + 6xy + y²

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183. Factorise the following using appropriate identities:

4y² - 4y + 1

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184. Factorise the following using appropriate identities:

straight x squared minus straight y squared over 100

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185. Expand each of the following using suitable identities:
(x + 2y + 4z)²

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186. Expand each of the following using suitable identities:
(- 2x + 3y + 2z)²

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187. Expand each of the following using suitable identities:
(- 2x + 3y + 2z)²

(- 2x + 3y + 2z)²

(- 2x + 3y + 2 z)² = {(- 2x) + 3y + 2z)}²= (- 2x)² + (3y)² + (2z)² + 2(- 2x)(3y) + 2(3y)(2z) + 2(2z)(-2x)
| Using Identity V
= 4x² + 9y² + 4z²- 12xy + 12yz - 8zx

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188. Expand each of the following using suitable identities:
(3a -7b - c)²

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189. Expand each of the following using suitable identities:
(- 2x + 5y - 3z)²

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190. Expand each of the following using suitable identities:

open square brackets 1 fourth straight a minus 1 half straight b plus 1 close square brackets squared

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Previous Year Papers

Test Series

Test Yourself

Short Answer Type

187. Expand each of the following using suitable identities:(- 2x + 3y + 2z)2

187. Expand each of the following using suitable identities:
(- 2x + 3y + 2z)²