Question

Find the value of each of the following.
(a) 2ab + 3ab^2 – 5a²b, when a = -2, b = 0​

Answer 1

Answer:

=>2ab+3ab^2-5a^2b

=>a=-2,b=0 [Given]

=>By putting values in eq.

=>2(-2)(0)+3(-2)(0)^2-5(-2)^2(0)

=> 2×0+3×0-5×4×0

=> 0+0-20×0

=> 0+0-0

=> 0

Explanation:

Hope it helps you..

Answer 2

$\large{\underbrace{\sf{\purple{required \: solution:}}}}$

Given,

• $\boxed{ \sf \purple{ Eq - (a) 2ab + {3ab}^2 - {5a}^{2} b}}$

• $\sf \:a = -2, b = 0$

We need to find the value of 2ab + 3ab² - 5a²b

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according to the question,

$\rightarrow \sf 2ab + {3ab}^2 – {5a}^{2} b$

${\rightarrow \sf 2( - 2)(0)+ {3( - 2)(0)}^2 - {5( - 2)}^{2} (0)}$

${ \rightarrow \sf{2( - 2)(0)+ 3( - 2){(0)} - 5{(4)}(0)}}$

${ \rightarrow \sf{2 \times 0+ 3 \times 0} - 5 \times 0}$

${ \rightarrow \sf{0+ 0} - 0}$

${ \rightarrow \sf{0} - 0}$

${ \rightarrow \boxed{ \sf \purple{0} } }$

________

$\large{\underbrace{\sf{\purple{Explore \: more:}}}}$

• Use bodmas while doing these kind of sums.
• There are number of situations in which we need to multiply algebraic expressions.
• A monomial multiplied by a monomial always gives a monomial.
• Finding the products by using identities is much easier than finding by direct multiplication.
• We multiply term by term i.e every term of the expression is multiplied by every term in another expression.

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