Question

(e) The remainder when x3 + ax? + 6x + a is divided by (x + a) is:
ii) a
iii) 5a
iv) 5a2
(f) if x + 1/2=, then x2 + 1/x2 is:
i) 2
ii) 4
iii)0
iv) 6
(i) The side of a triangle are in the ratio 3:4:5. If the perimeter of the triangle is 84 cm, then area of the triangle is
1) 252 cm2
ii) 274 cm3
iii) 280 cm3
iv) 294 cm2
6) The adjacent sides of a parallelogram are 3 cm and 7 cm. the ratio of their altitudes is:
i) 3:7
ii) 7:3
iii) 3 : 10
iv) 4:3​

Answer 1

Answer:

243 cm2 ratio

Explanation:

step bay step

Answer 2

Answer:

1.the answer of first is none of the above because the answer is -5a. because quotient is x²+6 nad if we multiply it with quotient . then answer will be x³+ax²+6x+6a. so remainder will be -5a.

2. answwer is 17/4 because x=-1/2. and when we put the value of -1/2 in this we get 17/4.

3. let the sides be 3x,4x and 5x. then side will come using formula of perimeter is 21cm,14cm,7cm.

abd value if s =42.

using herons formula,

√s(s-21)(s-28)(s-35)=√42x21x14x7=√7⁴x2²x3²

=7²x 2 x 3= 294 cm²

4. 3:7 i think . because to specific ut there us insufficient data . we can't able to find area nor the heights