Question

3. Use suitable identities to find the following products:
(i) (3x + 4) (3x – 4y)
(ii) (x + 3y) (x – 3y) (4x2 + y2)
4. Visualise 3.685 on the number line, using successive magnification.
5. If 4x + 2y = 16 and xy = 8, find the value of 64x3 + 8y3.
6. Without plotting the points indicate the quadrant in which they will lie, if
(i) the ordinate is 6 and abscissa is – 4
(ii) the abscissa is – 3 and ordinate is – 2
7. Evaluate each of the following products without multiplying directly:
(i) 98 x 88
(ii) 138 x 66
8. Express each of the following decimal in the form p/q.
(i) 0.4545….
(ii) 0.2222….
9. Factorise the following using appropriate identities:
(i) 27x3 – 64y3
10. In which quadrant do the following points lie?
(i) (4, 4)
(ii) (-3, 3)​

Answer 1

Step-by-step explanation:

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