Math, asked by blis040790, 5 months ago

plss help me only those who know the answers!!!

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Answers

Answered by reyazahmadreyaz476
0
  1. 3y(2y-7)-3(y-4)-63

=

3( - 2)  |2( - 2) - 7|  - 3 |( - 2) - 4|

 - 63

-

 - 6 | - 4 - 7|  - 3 | - 2 - 4|  - 63

 - 6 \times 28 - 3 \times 8 - 63

 - 168 - 24 - 63

 - 187 - 63

 - 250

2.

2(a^{3}+ab) + 3 - ab

2 |(2^{3}  + (2)( - 3) |  + 3 - (2)( - 3)

2 |8 - 6|  + 3 + 6

2 \times 2 + 9

4 + 9

13

Answered by MrHyper
32

\Huge\mathfrak{{\orange{a}}{\blue{n}}{\pink{s}}{\purple{w}}{\red{e}}{\green{r}}:}

\bf{(i)~~3y(2y-7)-3(y-4)-63~when~y=-2}

\sf{~~~~~~3(-2)[2(-2)-7]-3(-2-4)-63}

\sf{:→-6(-4-7)-3(-6)}

\sf{:→-6(-11)-3(-6)}

\sf{:→66+18}

\sf{:→\color{red}{\underline{\boxed{\bf 84}}}}

―――――――――――――――――――――――――――――――――

\bf{(ii)~~2(a^{2}+ab)+3-ab~when~a=2~and~b=-3}

\sf{~~~~~~2[(2)^{2}+(2×-3)]+3-(2×-3)}

\sf{:→2(4-6)+3-(-6)}

\sf{:→2(-2)+3+6}

\sf{:→-4+9}

\sf{:→ \color{red}{\underline{\boxed{\bf 5}}}}

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