Question

Please solve this. no irrelevant answers please
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Answer 1

Answer:

a flattened structure of a higher plant, typically green and blade-like, that is attached to a stem directly or via a stalk. Leaves are the main organs of photosynthesis and transpiration.

Answer 2

Answer:

a) a=2 and b=-1

b) a=8 and b=3

Step-by-step explanation:

a) by rationalizing the denominator

√3-1/√3+1×√3-1/√3-1

=(√3-1)^2/(√3+1)(√3-1)

using identities (a-b)^2=a^2+b^2-2ab and

(a-b)(a+b)=a^2-b^2 in it

= (√3)^2+(1)^2-2×√3×1/(√3)^2-(1)^2

= 3+1-2√3/3-1

= 4-2√3/2

=4/2-2√3/2

=2-√3=2+(-√3)=a+b√3

a=2 and b=-1

b)by rationalizing the denominator

3+√7/3-√7×3+√7/3+√7

=(3+√7)^2/(3-√7)(3+√7)

using identities (a+b)^2=a^2+b^2+2ab and

(a+b)(a-b)=a^2-b^2 in it

= (3)^2+(√7)^2+2×3×√7/(3)^2-(√7)^2

=9+7+2×3×√7/9-7

=16+6√7/2

=16/2+6√7/2

=8+3√7=a+b√7

a=8 and b=3