Question

step by step solve maths questions​

Answer 1

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Answer 2

Answer:

1.) $\rm{6x^2 - 2x - 17}$

2.) $\rm{5y - 6x}$

3.) $\rm{-2a^2 + 2a - 4}$

4.) $\rm{\dfrac{-8}{7}x^3y^4}$

5.) $\rm{-40 y^5}$

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Solution of 1) :

★ Addition :-

$\rightarrow\rm{-2x^2 + 5x - 8 + (-9 - 7x + 8x^2) }$

$\rightarrow\rm{-2x^2 + 5x - 8 - 9 - 7x + 8x}$

$\rightarrow\boxed{\rm 6x^2 - 2x - 17}$

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Solution of 2) :

★ Subtraction :-

$\rightarrow\rm{4y - 5x - (x - y)}$

$\rightarrow\rm{4y - 5x - x + y}$

$\rightarrow\boxed{\rm 5y - 6x}$

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Solution of 3) :

★ Addition :-

$\rightarrow\rm{8a - 6a^2 + 9 - 10a - 8 + 8a^2}$

$\rightarrow\rm{-2a + 2a^2 + 1}$

★ Subtraction :-

$\rightarrow\rm{-3 - (-2a + 2a^2 + 1) }$

$\rightarrow\rm{-3 + 2a - 2a^2 - 1}$

$\rightarrow\boxed{\rm -2a^2 + 2a - 4}$

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Solution of 4) :

★ Multiplication/Product :-

$\rightarrow\rm{\dfrac{-4}{\cancel{3}}xy^3 \times \dfrac{\cancel{6}}{7}x^2y = - 4 xy^3 \times \dfrac{2}{7} x^2y}$

$\rightarrow\boxed{\rm \dfrac{-8}{7}x^3y^4}$

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Solution of 5) :

★ Multiplication/Product :-

$\rightarrow\rm{-8y^3 \times 5y^2}$

$\rightarrow\boxed{\rm -40 y^5}$

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