Question

Q.8.(a) Simplify(2−2)35(4)2and express the result with a positive index.
(b)Using suitable identity evaluate: 998 x 1002
(c)From a rectangular metal sheet of sides 7 cm and 14 cm, the largest possible circular sheet is cut off. Find the area of the remaining portion of the metal sheet.(d)Factorise the following:(i)9a2–16ab + 7b2(ii)72x2y3z5–45xy2z6+ 54x3y2z4

Answer 1

Answer:

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Step-by-step explanation:

a) Here X is the base & 2 is the exponent or index. · If p/q is a rational number and m is a positive integer ...

b). Evaluate 1002 X 998 by using a special product - 1139962. ... (1000+2) X (1000-2) [ (a + b) (a - b) = a² - b² ] 1000² - 2²

c). Find the area of the remaining portion of the metal - 67415… ... and 21cm,the largest possible circular sheet is cut off .