Question

1.7×2.4
this sum is of Algebraic Expression And Identities
I have pin a picture this way you have to solve
I have tried to solve it but can't get the right answer plz answer this​

Answer 1

$\Huge\mathfrak\red{Question:}$

Solve 1.7×2.4 using algebraic expression and identities.

$\Huge\mathfrak\green{Answer:}$

$\large{\boxed{\boxed{\mathrm{\blue{4.08 }}}}}$

$\bf\orange{Step-by-step \: explanation :}$

$\tt{1.7 \times 2.4}$

$\tt{(1 + 0.7) \times (1 + 1.4)}$

$\tt{ {1}^{2} + (0.7 + 1.4)(1) + (0.7)(1.4)}$

$\tt{1 + 2.1 \times 1 + 0.98}$

$\tt{1 + 2.1 + 0.98 }$

$\tt{ = 4.08}$

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Answer 2

Answer:

$= 1.7 \times 2.4 \\ = (2 - 0.3)(2 + 0.4 )\\ = {2}^{2} + (0.4 - 0.3)2 + ( - 0.3 \times 0.4) \\ = 4 + 0.1 \times 2 - 0.12 \\ = 4 + 0.2 - 0.12 \\ = 4.2 - 0.12 \\ = 4.08$

Step-by-step explanation:

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