Question

solve it who solve this question​

Answer 1

Answer:

$(5y - 4) {}^{2} - 40y \\ \\ first \: we \: solve \: (5y - 4) {}^{2} \: through \: (a - b) {}^{2} \: formula... \\ (a - b) {}^{2} =( a )^{2} + (b) {}^{2} - 2b \\ (5y - 4) {}^{2} =( 5y) {}^{2} + (4) {}^{2} - 2 \times 5y \times 4 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 25y {}^{2} + 16 \: - 40y \\ \\ then \: write \: full \: equation \: = > \\ = 25y {}^{2} + 16 \: - 40y \: - 40y \\ = 25y {}^{2} + 16 \: - 80y \\ \\ hope \: this \: helps \: u...... \\ thnksss \\ mark \: it \: as \: brinliest \: \\ folow \: mee...$