Question

Simplify and tell the answer in step by step explanation and I will mark you as brilliant also​

Answer 1

Answer:

3x(4x−5)+3=12x2−15x+3

x=3 gives the value 12(9)−15×3+3

                                          =108−45+3

                                          =66

Answer 2

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$\large\bf{\underline{\red{VERIFIED✔}}}$

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Simplify (5m+4n)²

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$\red{ \implies (5m + 4n) ^{2}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \red{\implies [(5m) ^{2} +2(5m)(4n)+(4n)^{2} ]} \\ \\ \red{\implies 25m ^{2} +40mn+16n ^{2}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\boxed{I \:Hope\: it's \:Helpful}$

${\sf{\bf{\blue{@ℐᴛz ᴅɪɴᴜ࿐}}}}$