Question

1. Factorisation of y(y+z) + 9(y+z) = ______

2. If for two quantities x and y in direct proportion X1 = 1 and Y1 = 8 then for X2 = 4 find value of Y2

3. The perimeter of a closed semicircle whose diameter is 2.8 cm is _____

4. Find the product using identity (xy + 3z)2

5. Add : 2x(z-x-y) and 2y(z-y-x)

6. (-3)4x(53)
please answer step by step

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Answer 1

Answer:

1. (y+9)(y+z) = 0

y= -9, -z

2.1/8 = 4/y2

y2 = 32

3. perimeter πr+d = 3.14*1.4 + 2.8 = 7.196

4.

5. 2(xz+yz-xy-x²-xy²-y²)

6. -636