Question

$1)$40 X (-15) +30×(-15)

$2)$(-25) ×13+(-25) ×7

$3)$13×(-21) +(-21) ×17

$4)$221×2+(-98) ×(-221) ​

Answer 1

$\sf{\underline{\boxed{\large{\blue{\mathsf{Answer}}}}}}$

• For solving these equation take note of BODMAS rule .
• Multiplication and addition of signs " - " and " + " must be done carefully .

$\sf{\bold{\green{\underline{\underline{solution \: 1 }}}}}$

$\sf\implies 40\times - 15 + 30 \times - 15$

$\sf\implies -600 + ( - 450 )$

$\sf\implies -600 - 450$

$\sf\implies -1050$

$\sf{\red{\boxed{\bold{\dag - 1050}}}}$

__________________________

$\sf{\bold{\green{\underline{\underline{solution \: 2 }}}}}$

$\sf\implies -25\times 13 + -25 \times 7$

$\sf\implies -325 + ( - 175 )$

$\sf\implies -325 - 175$

$\sf\implies -300$

$\sf{\red{\boxed{\bold{\dag - 300}}}}$

___________________________

$\sf{\bold{\green{\underline{\underline{solution \: 3 }}}}}$

$\sf\implies 13\times - 21 + -21 \times 17$

$\sf\implies -273 + ( - 357 )$

$\sf\implies -273 - 357$

$\sf\implies -630$

$\sf{\red{\boxed{\bold{\dag - 630}}}}$

_________________________

$\sf{\bold{\green{\underline{\underline{solution \: 4 }}}}}$

$\sf\implies 221\times 2 + -98 \times - 221$

$\sf\implies 442 + ( + 21658 )$

$\sf\implies 442 + 21658$

$\sf\implies 22100$

$\sf{\red{\boxed{\bold{\dag 22100}}}}$

Answer 2

Answer:

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