Question

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Answer 1

Answer:

Step-by-step explanation:

6d588e60540aa71fad93e929b672dea2.pdf

Answer 2

$\small\colorbox{lightyellow} {\text{ \bf♕ Brainliest answer }}$

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$\rm⟹ \bigg(5{a}^{2}+3b-7c \bigg) \bigg(5{a}^{2}+3b-7c \bigg)$

$\rm⟹5{a}^{2} \bigg(5{a}^{2}+3b-7c\bigg)+3b\bigg(5{a}^{2}+3b-7c\bigg)-7c\bigg(5{a}^{2}+3b-7c\bigg)$

$\rm⟹25{a}^{4}+15{a}^{2}b-35{a}^{2}c+15b{a}^{2}+9{b}^{2}-21bc- \bigg(35c{a}^{2}+21cb-49{c}^{2} \bigg)$

$\rm⟹25{a}^{4}+15{a}^{2}b-35{a}^{2}c+15b{a}^{2}+9{b}^{2}-21bc-35c{a}^{2}-21cb+49{c}^{2}$

$\rm \implies25{a}^{4}+ \bigg(15{a}^{2}b+15{a}^{2}b\bigg)+\bigg(-35{a}^{2}c-35{a}^{2}c\bigg)+9{b}^{2}+\bigg(-21bc-21bc\bigg)+49{c}^{2}$

$\boxed{\color{olive} \implies \rm 25{a}^{4}+30{a}^{2}b-70{a}^{2}c+9{b}^{2}-42bc+49{c}^{2}}$